/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/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:19:50,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,862 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,298 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2020-12-21 21:19:51,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c64aeae/dab0f71b6f314016a1b072fe4b4e1fe2/FLAG22ca462c3 [2020-12-21 21:19:52,081 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:52,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2020-12-21 21:19:52,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c64aeae/dab0f71b6f314016a1b072fe4b4e1fe2/FLAG22ca462c3 [2020-12-21 21:19:52,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c64aeae/dab0f71b6f314016a1b072fe4b4e1fe2 [2020-12-21 21:19:52,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64866e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,651 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/array-examples/sorting_bubblesort_ground-1.i[820,833] [2020-12-21 21:19:52,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,676 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,691 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/array-examples/sorting_bubblesort_ground-1.i[820,833] [2020-12-21 21:19:52,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,716 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (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 [2020-12-21 21:19:52,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:52,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:52,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,223 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,224 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 21:19:53,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62923ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62923ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,250 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2020-12-21 21:19:53,268 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,276 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:19:53,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:19:53,368 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,368 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,368 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,369 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,369 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-21 21:19:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,396 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2020-12-21 21:19:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507007481] [2020-12-21 21:19:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507007481] [2020-12-21 21:19:53,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934889200] [2020-12-21 21:19:53,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,688 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-21 21:19:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,747 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-21 21:19:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,761 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:19:53,761 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:19:53,764 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 [2020-12-21 21:19:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:19:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:19:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:19:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 21:19:53,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-21 21:19:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,806 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 21:19:53,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 21:19:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:53,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:53,810 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2020-12-21 21:19:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998498148] [2020-12-21 21:19:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998498148] [2020-12-21 21:19:53,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645814659] [2020-12-21 21:19:53,914 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 [2020-12-21 21:19:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077674392] [2020-12-21 21:19:54,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,017 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 21:19:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,029 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-21 21:19:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:19:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,030 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:19:54,030 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:19:54,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:19:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:19:54,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:19:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-21 21:19:54,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2020-12-21 21:19:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,037 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-21 21:19:54,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-21 21:19:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:19:54,255 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2020-12-21 21:19:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468546989] [2020-12-21 21:19:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468546989] [2020-12-21 21:19:54,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130994506] [2020-12-21 21:19:54,307 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 [2020-12-21 21:19:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848246173] [2020-12-21 21:19:54,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,383 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2020-12-21 21:19:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,402 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-12-21 21:19:54,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:19:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,404 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:19:54,404 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:54,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:19:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:19:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-21 21:19:54,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2020-12-21 21:19:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,413 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-21 21:19:54,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-21 21:19:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:19:54,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2020-12-21 21:19:54,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692136383] [2020-12-21 21:19:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692136383] [2020-12-21 21:19:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974623632] [2020-12-21 21:19:54,672 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 [2020-12-21 21:19:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:54,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45013211] [2020-12-21 21:19:54,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,781 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-21 21:19:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,802 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-12-21 21:19:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-21 21:19:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,804 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:19:54,804 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:54,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 21:19:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:19:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-21 21:19:54,810 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-21 21:19:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,810 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-21 21:19:54,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-21 21:19:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:19:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,026 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2020-12-21 21:19:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382598107] [2020-12-21 21:19:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382598107] [2020-12-21 21:19:55,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324098060] [2020-12-21 21:19:55,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:55,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:19:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983863612] [2020-12-21 21:19:55,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,294 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2020-12-21 21:19:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,361 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-12-21 21:19:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:55,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-21 21:19:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,364 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:19:55,364 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:19:55,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:19:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-21 21:19:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 21:19:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-21 21:19:55,379 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2020-12-21 21:19:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,383 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-21 21:19:55,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-21 21:19:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:19:55,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,598 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2020-12-21 21:19:55,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937969794] [2020-12-21 21:19:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:19:55,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937969794] [2020-12-21 21:19:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738654780] [2020-12-21 21:19:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:19:55,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:19:55,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-21 21:19:55,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534856860] [2020-12-21 21:19:55,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:19:55,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:19:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,778 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2020-12-21 21:19:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,840 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-12-21 21:19:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:55,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-21 21:19:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,842 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:19:55,842 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:19:55,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:19:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-21 21:19:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:19:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 21:19:55,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2020-12-21 21:19:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,858 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 21:19:55,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:19:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 21:19:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:19:55,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,860 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:19:56,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2020-12-21 21:19:56,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287272985] [2020-12-21 21:19:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287272985] [2020-12-21 21:19:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287502963] [2020-12-21 21:19:56,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:56,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:56,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849600074] [2020-12-21 21:19:56,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:56,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:56,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,275 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-12-21 21:19:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,309 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-21 21:19:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-21 21:19:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,311 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:19:56,311 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:19:56,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:19:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-21 21:19:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:19:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-21 21:19:56,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2020-12-21 21:19:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,321 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-21 21:19:56,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-21 21:19:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:19:56,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,532 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2020-12-21 21:19:56,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311068438] [2020-12-21 21:19:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311068438] [2020-12-21 21:19:56,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611001666] [2020-12-21 21:19:56,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:19:56,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:19:56,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:19:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611446491] [2020-12-21 21:19:56,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:56,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:56,809 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-21 21:19:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,910 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-12-21 21:19:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:19:56,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-21 21:19:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,912 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:19:56,912 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:19:56,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:19:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-21 21:19:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:19:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:19:56,919 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-12-21 21:19:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,920 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:19:56,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:19:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:19:56,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,921 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,137 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,139 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2020-12-21 21:19:57,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356188772] [2020-12-21 21:19:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 21:19:57,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356188772] [2020-12-21 21:19:57,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951502615] [2020-12-21 21:19:57,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:19:57,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:19:57,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527270066] [2020-12-21 21:19:57,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,413 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-21 21:19:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,480 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-21 21:19:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:19:57,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-21 21:19:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,482 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:19:57,482 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:57,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-21 21:19:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:19:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-21 21:19:57,489 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-12-21 21:19:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,490 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-21 21:19:57,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-21 21:19:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:57,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,491 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:19:57,706 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2020-12-21 21:19:57,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129165255] [2020-12-21 21:19:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129165255] [2020-12-21 21:19:57,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683340166] [2020-12-21 21:19:57,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:57,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330892793] [2020-12-21 21:19:57,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:57,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:57,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:57,963 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2020-12-21 21:19:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,996 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-12-21 21:19:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:57,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-21 21:19:57,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,998 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:19:57,998 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:19:57,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:19:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:19:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:19:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-12-21 21:19:58,005 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2020-12-21 21:19:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,006 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-12-21 21:19:58,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-12-21 21:19:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:19:58,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,007 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,221 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2020-12-21 21:19:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168122450] [2020-12-21 21:19:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168122450] [2020-12-21 21:19:58,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499932663] [2020-12-21 21:19:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:19:58,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167239566] [2020-12-21 21:19:58,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:58,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:58,489 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-12-21 21:19:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,539 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-12-21 21:19:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:58,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-12-21 21:19:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,541 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:19:58,541 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:58,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-21 21:19:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:19:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-21 21:19:58,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2020-12-21 21:19:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,561 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-21 21:19:58,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-21 21:19:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:19:58,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,564 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,782 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2020-12-21 21:19:58,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530780538] [2020-12-21 21:19:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:19:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530780538] [2020-12-21 21:19:58,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824800181] [2020-12-21 21:19:58,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:19:58,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:19:59,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:19:59,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:19:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:19:59,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-12-21 21:19:59,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129260642] [2020-12-21 21:19:59,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:19:59,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:19:59,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:19:59,230 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 20 states. [2020-12-21 21:19:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,729 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2020-12-21 21:19:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:19:59,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-12-21 21:19:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,730 INFO L225 Difference]: With dead ends: 127 [2020-12-21 21:19:59,730 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:19:59,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:19:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:19:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-12-21 21:19:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:19:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-12-21 21:19:59,739 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 45 [2020-12-21 21:19:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,739 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-12-21 21:19:59,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:19:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-12-21 21:19:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:19:59,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,741 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:59,954 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash 954995151, now seen corresponding path program 1 times [2020-12-21 21:19:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107225877] [2020-12-21 21:19:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 21:20:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107225877] [2020-12-21 21:20:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416359816] [2020-12-21 21:20:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 21:20:00,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:00,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568825470] [2020-12-21 21:20:00,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:00,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:00,339 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 14 states. [2020-12-21 21:20:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,384 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-12-21 21:20:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:00,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-12-21 21:20:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,385 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:20:00,385 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:20:00,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:20:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-21 21:20:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:20:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-12-21 21:20:00,393 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 51 [2020-12-21 21:20:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,393 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-12-21 21:20:00,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-12-21 21:20:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:20:00,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,394 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:20:00,608 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1796222579, now seen corresponding path program 2 times [2020-12-21 21:20:00,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403547168] [2020-12-21 21:20:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 21:20:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403547168] [2020-12-21 21:20:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2371651] [2020-12-21 21:20:00,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:00,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 21:20:00,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:20:00,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737243816] [2020-12-21 21:20:00,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:20:00,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:20:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:00,913 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 15 states. [2020-12-21 21:20:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,962 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-12-21 21:20:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:00,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-12-21 21:20:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,964 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:20:00,964 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:20:00,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:20:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-21 21:20:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:20:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-21 21:20:00,971 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 53 [2020-12-21 21:20:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,971 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-21 21:20:00,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:20:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-21 21:20:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:20:00,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,972 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:20:01,186 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash -16606773, now seen corresponding path program 3 times [2020-12-21 21:20:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303348365] [2020-12-21 21:20:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-21 21:20:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303348365] [2020-12-21 21:20:01,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580365748] [2020-12-21 21:20:01,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:20:01,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:20:01,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-21 21:20:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29841596] [2020-12-21 21:20:01,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:01,604 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 21 states. [2020-12-21 21:20:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,713 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-21 21:20:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:01,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-12-21 21:20:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,715 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:20:01,715 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 21:20:01,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 21:20:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-12-21 21:20:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:20:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-21 21:20:01,721 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 55 [2020-12-21 21:20:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,721 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-21 21:20:01,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-21 21:20:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:20:01,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,722 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,934 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1404931173, now seen corresponding path program 4 times [2020-12-21 21:20:01,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619282263] [2020-12-21 21:20:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:20:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619282263] [2020-12-21 21:20:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689995472] [2020-12-21 21:20:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:20:02,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:02,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41841295] [2020-12-21 21:20:02,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:02,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,298 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 17 states. [2020-12-21 21:20:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,380 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-12-21 21:20:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:02,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-21 21:20:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,381 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:20:02,382 INFO L226 Difference]: Without dead ends: 83 [2020-12-21 21:20:02,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-21 21:20:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-21 21:20:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:20:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-12-21 21:20:02,389 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 60 [2020-12-21 21:20:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,390 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-12-21 21:20:02,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-12-21 21:20:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:20:02,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,390 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:02,604 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -452812185, now seen corresponding path program 5 times [2020-12-21 21:20:02,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124502313] [2020-12-21 21:20:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-21 21:20:02,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124502313] [2020-12-21 21:20:02,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904921895] [2020-12-21 21:20:02,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-21 21:20:02,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-21 21:20:03,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-21 21:20:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694497089] [2020-12-21 21:20:03,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:03,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:03,148 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 24 states. [2020-12-21 21:20:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,249 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2020-12-21 21:20:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:20:03,250 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-12-21 21:20:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,251 INFO L225 Difference]: With dead ends: 146 [2020-12-21 21:20:03,251 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:20:03,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:20:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-12-21 21:20:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:20:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-12-21 21:20:03,257 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 62 [2020-12-21 21:20:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,257 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-12-21 21:20:03,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-12-21 21:20:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:20:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,258 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:03,471 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash -313320699, now seen corresponding path program 6 times [2020-12-21 21:20:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610924179] [2020-12-21 21:20:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-21 21:20:03,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610924179] [2020-12-21 21:20:03,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913022358] [2020-12-21 21:20:03,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:04,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:04,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:04,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:04,275 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-12-21 21:20:04,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2020-12-21 21:20:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253170667] [2020-12-21 21:20:04,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:04,316 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 29 states. [2020-12-21 21:20:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,134 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2020-12-21 21:20:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:05,135 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-12-21 21:20:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,137 INFO L225 Difference]: With dead ends: 191 [2020-12-21 21:20:05,137 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 21:20:05,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 21:20:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-12-21 21:20:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 21:20:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2020-12-21 21:20:05,146 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 67 [2020-12-21 21:20:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,146 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2020-12-21 21:20:05,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2020-12-21 21:20:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:20:05,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,151 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:20:05,363 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1186642617, now seen corresponding path program 7 times [2020-12-21 21:20:05,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567062907] [2020-12-21 21:20:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 21:20:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567062907] [2020-12-21 21:20:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570423144] [2020-12-21 21:20:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 21:20:05,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:05,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838753727] [2020-12-21 21:20:05,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:05,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:05,756 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 20 states. [2020-12-21 21:20:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,812 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2020-12-21 21:20:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:05,812 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-12-21 21:20:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,813 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:20:05,813 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:20:05,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:20:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-21 21:20:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-21 21:20:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-12-21 21:20:05,820 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 73 [2020-12-21 21:20:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,820 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-12-21 21:20:05,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-12-21 21:20:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:20:05,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,821 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,036 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2136672265, now seen corresponding path program 8 times [2020-12-21 21:20:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120786191] [2020-12-21 21:20:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 21:20:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120786191] [2020-12-21 21:20:06,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301475070] [2020-12-21 21:20:06,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:06,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 21:20:06,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:06,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770552956] [2020-12-21 21:20:06,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:06,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:06,533 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 21 states. [2020-12-21 21:20:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,604 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2020-12-21 21:20:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:06,605 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-12-21 21:20:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,606 INFO L225 Difference]: With dead ends: 162 [2020-12-21 21:20:06,606 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:20:06,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:20:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-21 21:20:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 21:20:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2020-12-21 21:20:06,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 75 [2020-12-21 21:20:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,613 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2020-12-21 21:20:06,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2020-12-21 21:20:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:20:06,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,615 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,829 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash -386605643, now seen corresponding path program 9 times [2020-12-21 21:20:06,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454705175] [2020-12-21 21:20:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 21:20:07,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454705175] [2020-12-21 21:20:07,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073494906] [2020-12-21 21:20:07,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:20:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:20:07,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2020-12-21 21:20:07,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112251802] [2020-12-21 21:20:07,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:07,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:07,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:07,442 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand 29 states. [2020-12-21 21:20:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,594 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-21 21:20:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:07,595 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-12-21 21:20:07,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,596 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:20:07,596 INFO L226 Difference]: Without dead ends: 113 [2020-12-21 21:20:07,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-21 21:20:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-12-21 21:20:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 21:20:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-12-21 21:20:07,603 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 77 [2020-12-21 21:20:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,603 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-12-21 21:20:07,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-12-21 21:20:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:20:07,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,604 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:07,819 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -26441113, now seen corresponding path program 10 times [2020-12-21 21:20:07,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129537897] [2020-12-21 21:20:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-12-21 21:20:08,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129537897] [2020-12-21 21:20:08,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548199820] [2020-12-21 21:20:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-12-21 21:20:08,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2020-12-21 21:20:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274173474] [2020-12-21 21:20:08,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:08,452 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 31 states. [2020-12-21 21:20:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,575 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2020-12-21 21:20:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:08,575 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-12-21 21:20:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,576 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:20:08,576 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:20:08,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:20:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-12-21 21:20:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:20:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-12-21 21:20:08,584 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 82 [2020-12-21 21:20:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,584 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-12-21 21:20:08,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-12-21 21:20:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:20:08,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,585 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:08,800 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1547212721, now seen corresponding path program 11 times [2020-12-21 21:20:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303129026] [2020-12-21 21:20:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-21 21:20:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303129026] [2020-12-21 21:20:09,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247322843] [2020-12-21 21:20:09,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:10,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-21 21:20:10,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-12-21 21:20:10,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-21 21:20:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233227736] [2020-12-21 21:20:10,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:20:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:20:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:10,291 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 33 states. [2020-12-21 21:20:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,487 INFO L93 Difference]: Finished difference Result 202 states and 252 transitions. [2020-12-21 21:20:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:20:10,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2020-12-21 21:20:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,488 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:20:10,488 INFO L226 Difference]: Without dead ends: 129 [2020-12-21 21:20:10,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-21 21:20:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2020-12-21 21:20:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-21 21:20:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2020-12-21 21:20:10,513 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 87 [2020-12-21 21:20:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,513 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2020-12-21 21:20:10,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:20:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2020-12-21 21:20:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-21 21:20:10,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,514 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:10,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:10,729 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -279911317, now seen corresponding path program 12 times [2020-12-21 21:20:10,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:10,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988348562] [2020-12-21 21:20:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-21 21:20:11,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988348562] [2020-12-21 21:20:11,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475930244] [2020-12-21 21:20:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:12,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:20:12,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:20:12,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:12,327 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 21:20:12,328 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:20:12,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:20:12,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:20:12,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-21 21:20:12,629 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:12,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:12,839 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:12,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:12,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 1 proven. 193 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-12-21 21:20:12,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:12,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-21 21:20:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438726569] [2020-12-21 21:20:12,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:20:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:20:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:12,915 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 39 states. [2020-12-21 21:20:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:14,136 INFO L93 Difference]: Finished difference Result 262 states and 328 transitions. [2020-12-21 21:20:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:20:14,136 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-12-21 21:20:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:14,138 INFO L225 Difference]: With dead ends: 262 [2020-12-21 21:20:14,138 INFO L226 Difference]: Without dead ends: 183 [2020-12-21 21:20:14,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:20:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-21 21:20:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2020-12-21 21:20:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-21 21:20:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-12-21 21:20:14,147 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 92 [2020-12-21 21:20:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:14,147 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-12-21 21:20:14,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:20:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-12-21 21:20:14,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 21:20:14,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:14,148 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:14,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:14,363 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash 156674403, now seen corresponding path program 13 times [2020-12-21 21:20:14,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:14,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457340193] [2020-12-21 21:20:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-21 21:20:14,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457340193] [2020-12-21 21:20:14,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105312670] [2020-12-21 21:20:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-21 21:20:14,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:14,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:14,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986581124] [2020-12-21 21:20:14,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:14,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:14,956 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 26 states. [2020-12-21 21:20:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,051 INFO L93 Difference]: Finished difference Result 216 states and 264 transitions. [2020-12-21 21:20:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:15,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-12-21 21:20:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,052 INFO L225 Difference]: With dead ends: 216 [2020-12-21 21:20:15,052 INFO L226 Difference]: Without dead ends: 133 [2020-12-21 21:20:15,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-21 21:20:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-21 21:20:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 21:20:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-12-21 21:20:15,060 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 98 [2020-12-21 21:20:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,060 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-12-21 21:20:15,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-12-21 21:20:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 21:20:15,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,062 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:15,276 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 639446501, now seen corresponding path program 14 times [2020-12-21 21:20:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881349523] [2020-12-21 21:20:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-21 21:20:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881349523] [2020-12-21 21:20:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218987448] [2020-12-21 21:20:15,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:15,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-21 21:20:15,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:20:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128177420] [2020-12-21 21:20:15,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:15,878 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 27 states. [2020-12-21 21:20:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,971 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2020-12-21 21:20:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:15,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2020-12-21 21:20:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,973 INFO L225 Difference]: With dead ends: 218 [2020-12-21 21:20:15,973 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 21:20:15,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 21:20:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-21 21:20:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 21:20:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-12-21 21:20:15,980 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 100 [2020-12-21 21:20:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,981 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-12-21 21:20:15,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-12-21 21:20:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-21 21:20:15,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,982 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:20:16,196 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash 726964711, now seen corresponding path program 15 times [2020-12-21 21:20:16,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784710974] [2020-12-21 21:20:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-21 21:20:16,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784710974] [2020-12-21 21:20:16,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536269230] [2020-12-21 21:20:16,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:16,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:20:16,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:16,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2020-12-21 21:20:17,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2020-12-21 21:20:17,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085488064] [2020-12-21 21:20:17,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:17,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:17,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:17,140 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 38 states. [2020-12-21 21:20:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,359 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2020-12-21 21:20:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:17,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 102 [2020-12-21 21:20:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,361 INFO L225 Difference]: With dead ends: 230 [2020-12-21 21:20:17,361 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 21:20:17,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 21:20:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-21 21:20:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-21 21:20:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-12-21 21:20:17,368 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 102 [2020-12-21 21:20:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,369 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-12-21 21:20:17,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-12-21 21:20:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-21 21:20:17,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,370 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:17,584 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1477409059, now seen corresponding path program 16 times [2020-12-21 21:20:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621448758] [2020-12-21 21:20:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-21 21:20:18,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621448758] [2020-12-21 21:20:18,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289130707] [2020-12-21 21:20:18,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:18,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-21 21:20:18,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:18,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694295694] [2020-12-21 21:20:18,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:18,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:18,320 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 29 states. [2020-12-21 21:20:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:18,418 INFO L93 Difference]: Finished difference Result 234 states and 286 transitions. [2020-12-21 21:20:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:18,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 107 [2020-12-21 21:20:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:18,420 INFO L225 Difference]: With dead ends: 234 [2020-12-21 21:20:18,420 INFO L226 Difference]: Without dead ends: 145 [2020-12-21 21:20:18,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-21 21:20:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-12-21 21:20:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-21 21:20:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-12-21 21:20:18,427 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 107 [2020-12-21 21:20:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:18,428 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-12-21 21:20:18,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-12-21 21:20:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:20:18,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:18,429 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:18,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:20:18,642 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1971975323, now seen corresponding path program 17 times [2020-12-21 21:20:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:18,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984608849] [2020-12-21 21:20:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-21 21:20:19,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984608849] [2020-12-21 21:20:19,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113603204] [2020-12-21 21:20:19,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:20,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-21 21:20:20,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2020-12-21 21:20:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2020-12-21 21:20:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701653741] [2020-12-21 21:20:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:20:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:20:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:20,939 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 41 states. [2020-12-21 21:20:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:21,204 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-21 21:20:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:20:21,205 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 109 [2020-12-21 21:20:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:21,206 INFO L225 Difference]: With dead ends: 246 [2020-12-21 21:20:21,206 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 21:20:21,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 21:20:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-12-21 21:20:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-21 21:20:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-12-21 21:20:21,215 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 109 [2020-12-21 21:20:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:21,215 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-12-21 21:20:21,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:20:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-12-21 21:20:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:20:21,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:21,217 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:21,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:21,432 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2036101997, now seen corresponding path program 18 times [2020-12-21 21:20:21,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:21,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745465052] [2020-12-21 21:20:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2020-12-21 21:20:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745465052] [2020-12-21 21:20:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587449903] [2020-12-21 21:20:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:23,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:20:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:20:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:23,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:23,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:23,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:23,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:23,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 1 proven. 328 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2020-12-21 21:20:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:23,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21] total 48 [2020-12-21 21:20:23,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122876015] [2020-12-21 21:20:23,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:20:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:20:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:20:23,914 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 48 states. [2020-12-21 21:20:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:25,792 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2020-12-21 21:20:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 21:20:25,793 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2020-12-21 21:20:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:25,800 INFO L225 Difference]: With dead ends: 315 [2020-12-21 21:20:25,800 INFO L226 Difference]: Without dead ends: 220 [2020-12-21 21:20:25,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=639, Invalid=2901, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:20:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-21 21:20:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 158. [2020-12-21 21:20:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-21 21:20:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2020-12-21 21:20:25,814 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 114 [2020-12-21 21:20:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:25,814 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2020-12-21 21:20:25,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:20:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2020-12-21 21:20:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-21 21:20:25,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:25,816 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:26,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:26,030 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 283531749, now seen corresponding path program 19 times [2020-12-21 21:20:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:26,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128054003] [2020-12-21 21:20:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:20:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128054003] [2020-12-21 21:20:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542918177] [2020-12-21 21:20:26,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:26,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:20:26,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:26,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:26,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481633544] [2020-12-21 21:20:26,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:26,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:26,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:26,826 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 32 states. [2020-12-21 21:20:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:26,953 INFO L93 Difference]: Finished difference Result 260 states and 316 transitions. [2020-12-21 21:20:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:26,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-12-21 21:20:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:26,955 INFO L225 Difference]: With dead ends: 260 [2020-12-21 21:20:26,955 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 21:20:26,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 21:20:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-12-21 21:20:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-21 21:20:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2020-12-21 21:20:26,963 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 120 [2020-12-21 21:20:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:26,969 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2020-12-21 21:20:26,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2020-12-21 21:20:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:20:26,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:26,971 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:27,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:27,184 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -178147097, now seen corresponding path program 20 times [2020-12-21 21:20:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:27,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525408596] [2020-12-21 21:20:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:20:27,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525408596] [2020-12-21 21:20:27,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978660248] [2020-12-21 21:20:27,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:27,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:20:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:20:28,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:28,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:20:28,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610388543] [2020-12-21 21:20:28,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:20:28,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:20:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:28,069 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand 33 states. [2020-12-21 21:20:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:28,185 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2020-12-21 21:20:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:28,186 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-12-21 21:20:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:28,187 INFO L225 Difference]: With dead ends: 262 [2020-12-21 21:20:28,187 INFO L226 Difference]: Without dead ends: 163 [2020-12-21 21:20:28,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-21 21:20:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-21 21:20:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 21:20:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2020-12-21 21:20:28,195 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 122 [2020-12-21 21:20:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:28,195 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2020-12-21 21:20:28,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:20:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2020-12-21 21:20:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:20:28,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:28,196 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:28,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:28,410 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1469886615, now seen corresponding path program 21 times [2020-12-21 21:20:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098077447] [2020-12-21 21:20:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:20:29,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098077447] [2020-12-21 21:20:29,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086331868] [2020-12-21 21:20:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:29,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 21:20:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2020-12-21 21:20:29,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:29,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2020-12-21 21:20:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643449398] [2020-12-21 21:20:29,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:20:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:20:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:20:29,843 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand 46 states. [2020-12-21 21:20:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:30,053 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2020-12-21 21:20:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:20:30,054 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 124 [2020-12-21 21:20:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:30,055 INFO L225 Difference]: With dead ends: 274 [2020-12-21 21:20:30,055 INFO L226 Difference]: Without dead ends: 175 [2020-12-21 21:20:30,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:20:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-21 21:20:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-12-21 21:20:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-21 21:20:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2020-12-21 21:20:30,065 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 124 [2020-12-21 21:20:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:30,065 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2020-12-21 21:20:30,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:20:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2020-12-21 21:20:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-21 21:20:30,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:30,066 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:30,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:30,280 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1176120135, now seen corresponding path program 22 times [2020-12-21 21:20:30,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:30,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90092980] [2020-12-21 21:20:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-21 21:20:31,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90092980] [2020-12-21 21:20:31,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268833928] [2020-12-21 21:20:31,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:31,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-21 21:20:31,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:31,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:20:31,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443508583] [2020-12-21 21:20:31,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:31,267 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand 35 states. [2020-12-21 21:20:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:31,375 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2020-12-21 21:20:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:31,375 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 129 [2020-12-21 21:20:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:31,376 INFO L225 Difference]: With dead ends: 278 [2020-12-21 21:20:31,377 INFO L226 Difference]: Without dead ends: 173 [2020-12-21 21:20:31,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-21 21:20:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-12-21 21:20:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-21 21:20:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-12-21 21:20:31,384 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 129 [2020-12-21 21:20:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:31,385 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-12-21 21:20:31,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-12-21 21:20:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:20:31,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:31,386 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:31,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:31,596 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 436442757, now seen corresponding path program 23 times [2020-12-21 21:20:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487950308] [2020-12-21 21:20:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-21 21:20:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487950308] [2020-12-21 21:20:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758958211] [2020-12-21 21:20:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:42,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-12-21 21:20:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-12-21 21:20:43,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:43,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 16] total 49 [2020-12-21 21:20:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138612057] [2020-12-21 21:20:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:20:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:20:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:43,381 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 49 states. [2020-12-21 21:20:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:43,671 INFO L93 Difference]: Finished difference Result 290 states and 356 transitions. [2020-12-21 21:20:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:20:43,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 131 [2020-12-21 21:20:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:43,673 INFO L225 Difference]: With dead ends: 290 [2020-12-21 21:20:43,673 INFO L226 Difference]: Without dead ends: 185 [2020-12-21 21:20:43,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-21 21:20:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2020-12-21 21:20:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 21:20:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 212 transitions. [2020-12-21 21:20:43,681 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 212 transitions. Word has length 131 [2020-12-21 21:20:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:43,682 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 212 transitions. [2020-12-21 21:20:43,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:20:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 212 transitions. [2020-12-21 21:20:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:20:43,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:43,683 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:43,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:43,896 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash -978057361, now seen corresponding path program 24 times [2020-12-21 21:20:43,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:43,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141770493] [2020-12-21 21:20:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-12-21 21:20:44,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141770493] [2020-12-21 21:20:44,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624659490] [2020-12-21 21:20:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:49,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-21 21:20:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2020-12-21 21:20:50,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:50,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17] total 51 [2020-12-21 21:20:50,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70279117] [2020-12-21 21:20:50,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-21 21:20:50,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-21 21:20:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-12-21 21:20:50,524 INFO L87 Difference]: Start difference. First operand 180 states and 212 transitions. Second operand 51 states. [2020-12-21 21:20:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:50,831 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2020-12-21 21:20:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-21 21:20:50,831 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 136 [2020-12-21 21:20:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:50,832 INFO L225 Difference]: With dead ends: 304 [2020-12-21 21:20:50,832 INFO L226 Difference]: Without dead ends: 193 [2020-12-21 21:20:50,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-12-21 21:20:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-21 21:20:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-12-21 21:20:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-21 21:20:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2020-12-21 21:20:50,843 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 136 [2020-12-21 21:20:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:50,843 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2020-12-21 21:20:50,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-21 21:20:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2020-12-21 21:20:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 21:20:50,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:50,844 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:51,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:51,059 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:51,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1542651775, now seen corresponding path program 25 times [2020-12-21 21:20:51,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:51,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7779264] [2020-12-21 21:20:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7779264] [2020-12-21 21:20:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478028454] [2020-12-21 21:20:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:52,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:20:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:52,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:52,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:20:52,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017296651] [2020-12-21 21:20:52,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:52,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:52,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:52,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:52,204 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 38 states. [2020-12-21 21:20:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:52,343 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2020-12-21 21:20:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:20:52,343 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 141 [2020-12-21 21:20:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:52,344 INFO L225 Difference]: With dead ends: 308 [2020-12-21 21:20:52,344 INFO L226 Difference]: Without dead ends: 191 [2020-12-21 21:20:52,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-21 21:20:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-12-21 21:20:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-21 21:20:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2020-12-21 21:20:52,353 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 141 [2020-12-21 21:20:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:52,353 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2020-12-21 21:20:52,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2020-12-21 21:20:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-21 21:20:52,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:52,355 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:52,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:52,570 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1776910015, now seen corresponding path program 26 times [2020-12-21 21:20:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:52,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378253742] [2020-12-21 21:20:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:53,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378253742] [2020-12-21 21:20:53,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837721386] [2020-12-21 21:20:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:53,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:53,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:20:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:53,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:53,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:20:53,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601583081] [2020-12-21 21:20:53,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:20:53,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:20:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:53,782 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand 39 states. [2020-12-21 21:20:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:53,909 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2020-12-21 21:20:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:53,910 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 143 [2020-12-21 21:20:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:53,912 INFO L225 Difference]: With dead ends: 310 [2020-12-21 21:20:53,912 INFO L226 Difference]: Without dead ends: 193 [2020-12-21 21:20:53,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:20:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-21 21:20:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-12-21 21:20:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-21 21:20:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2020-12-21 21:20:53,921 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 143 [2020-12-21 21:20:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:53,921 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2020-12-21 21:20:53,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:20:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2020-12-21 21:20:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-21 21:20:53,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:53,923 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:54,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:54,137 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash 715089277, now seen corresponding path program 27 times [2020-12-21 21:20:54,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:54,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812929183] [2020-12-21 21:20:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:20:55,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812929183] [2020-12-21 21:20:55,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62561771] [2020-12-21 21:20:55,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:55,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:20:55,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-21 21:20:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:56,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:56,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:56,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:56,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:20:56,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:20:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 1 proven. 542 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2020-12-21 21:20:56,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:56,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 60 [2020-12-21 21:20:56,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122016744] [2020-12-21 21:20:56,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 21:20:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 21:20:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=941, Invalid=2599, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:20:56,641 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 60 states. [2020-12-21 21:20:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:58,902 INFO L93 Difference]: Finished difference Result 389 states and 482 transitions. [2020-12-21 21:20:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-21 21:20:58,902 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 145 [2020-12-21 21:20:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:58,904 INFO L225 Difference]: With dead ends: 389 [2020-12-21 21:20:58,904 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:20:58,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1017, Invalid=4239, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 21:20:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:20:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2020-12-21 21:20:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 21:20:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2020-12-21 21:20:58,916 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 145 [2020-12-21 21:20:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:58,917 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2020-12-21 21:20:58,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 21:20:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2020-12-21 21:20:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 21:20:58,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:58,918 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:59,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:20:59,133 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash 592049329, now seen corresponding path program 28 times [2020-12-21 21:20:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:59,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110376890] [2020-12-21 21:20:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-21 21:21:00,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110376890] [2020-12-21 21:21:00,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053988195] [2020-12-21 21:21:00,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:00,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:21:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-21 21:21:00,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:00,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:21:00,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679851589] [2020-12-21 21:21:00,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:21:00,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:00,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:21:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:00,425 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand 41 states. [2020-12-21 21:21:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:00,558 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2020-12-21 21:21:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:21:00,558 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-12-21 21:21:00,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:00,560 INFO L225 Difference]: With dead ends: 322 [2020-12-21 21:21:00,560 INFO L226 Difference]: Without dead ends: 201 [2020-12-21 21:21:00,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-21 21:21:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-12-21 21:21:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-21 21:21:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2020-12-21 21:21:00,570 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 151 [2020-12-21 21:21:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:00,570 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2020-12-21 21:21:00,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:21:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2020-12-21 21:21:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 21:21:00,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:00,572 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:00,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:21:00,786 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:00,787 INFO L82 PathProgramCache]: Analyzing trace with hash -444318353, now seen corresponding path program 29 times [2020-12-21 21:21:00,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:00,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122239439] [2020-12-21 21:21:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-21 21:21:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122239439] [2020-12-21 21:21:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247894069] [2020-12-21 21:21:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:14,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-21 21:21:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:21:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2020-12-21 21:21:14,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:14,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18] total 57 [2020-12-21 21:21:14,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655029201] [2020-12-21 21:21:14,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-21 21:21:14,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-21 21:21:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:21:14,921 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand 57 states. [2020-12-21 21:21:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:15,201 INFO L93 Difference]: Finished difference Result 334 states and 408 transitions. [2020-12-21 21:21:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-21 21:21:15,202 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 153 [2020-12-21 21:21:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:15,203 INFO L225 Difference]: With dead ends: 334 [2020-12-21 21:21:15,203 INFO L226 Difference]: Without dead ends: 213 [2020-12-21 21:21:15,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:21:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-21 21:21:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2020-12-21 21:21:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-21 21:21:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2020-12-21 21:21:15,213 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 153 [2020-12-21 21:21:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:15,213 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2020-12-21 21:21:15,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-21 21:21:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2020-12-21 21:21:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 21:21:15,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:15,215 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:15,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:15,430 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2093752207, now seen corresponding path program 30 times [2020-12-21 21:21:15,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:15,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495448341] [2020-12-21 21:21:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-12-21 21:21:16,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495448341] [2020-12-21 21:21:16,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714923242] [2020-12-21 21:21:16,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:21,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-21 21:21:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:21:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 78 proven. 376 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2020-12-21 21:21:22,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:22,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 21] total 61 [2020-12-21 21:21:22,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515468934] [2020-12-21 21:21:22,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-21 21:21:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-21 21:21:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=2544, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 21:21:22,636 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand 61 states. [2020-12-21 21:21:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:23,764 INFO L93 Difference]: Finished difference Result 349 states and 428 transitions. [2020-12-21 21:21:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-21 21:21:23,765 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 158 [2020-12-21 21:21:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:23,766 INFO L225 Difference]: With dead ends: 349 [2020-12-21 21:21:23,766 INFO L226 Difference]: Without dead ends: 222 [2020-12-21 21:21:23,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1456, Invalid=4550, Unknown=0, NotChecked=0, Total=6006 [2020-12-21 21:21:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-21 21:21:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2020-12-21 21:21:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-21 21:21:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2020-12-21 21:21:23,778 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 158 [2020-12-21 21:21:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:23,778 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-12-21 21:21:23,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-21 21:21:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2020-12-21 21:21:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-21 21:21:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:23,779 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:23,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 21:21:23,994 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:23,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1709385943, now seen corresponding path program 31 times [2020-12-21 21:21:23,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:23,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987855099] [2020-12-21 21:21:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-21 21:21:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987855099] [2020-12-21 21:21:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361870086] [2020-12-21 21:21:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:21:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-21 21:21:25,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:25,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:21:25,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308593626] [2020-12-21 21:21:25,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:21:25,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:21:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:21:25,557 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand 45 states. [2020-12-21 21:21:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:25,751 INFO L93 Difference]: Finished difference Result 354 states and 430 transitions. [2020-12-21 21:21:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:21:25,751 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 165 [2020-12-21 21:21:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:25,752 INFO L225 Difference]: With dead ends: 354 [2020-12-21 21:21:25,752 INFO L226 Difference]: Without dead ends: 221 [2020-12-21 21:21:25,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:21:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-21 21:21:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-12-21 21:21:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-21 21:21:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2020-12-21 21:21:25,764 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 165 [2020-12-21 21:21:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:25,764 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2020-12-21 21:21:25,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:21:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2020-12-21 21:21:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-21 21:21:25,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:25,766 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:25,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:25,979 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1435630439, now seen corresponding path program 32 times [2020-12-21 21:21:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:25,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829855532] [2020-12-21 21:21:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-21 21:21:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829855532] [2020-12-21 21:21:27,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867545240] [2020-12-21 21:21:27,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:27,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:27,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:27,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:21:27,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-21 21:21:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:21:27,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127368199] [2020-12-21 21:21:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:21:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:21:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:27,579 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand 46 states. [2020-12-21 21:21:27,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:27,781 INFO L93 Difference]: Finished difference Result 356 states and 432 transitions. [2020-12-21 21:21:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:21:27,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 167 [2020-12-21 21:21:27,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:27,784 INFO L225 Difference]: With dead ends: 356 [2020-12-21 21:21:27,784 INFO L226 Difference]: Without dead ends: 223 [2020-12-21 21:21:27,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-21 21:21:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2020-12-21 21:21:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-21 21:21:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 260 transitions. [2020-12-21 21:21:27,795 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 260 transitions. Word has length 167 [2020-12-21 21:21:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:27,795 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 260 transitions. [2020-12-21 21:21:27,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:21:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 260 transitions. [2020-12-21 21:21:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-21 21:21:27,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:27,797 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:28,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:28,010 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:28,011 INFO L82 PathProgramCache]: Analyzing trace with hash 139397157, now seen corresponding path program 33 times [2020-12-21 21:21:28,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:28,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090967143] [2020-12-21 21:21:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-21 21:21:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090967143] [2020-12-21 21:21:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350762227] [2020-12-21 21:21:29,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:29,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-21 21:21:29,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:21:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 86 proven. 425 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2020-12-21 21:21:30,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:30,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 22] total 66 [2020-12-21 21:21:30,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600454756] [2020-12-21 21:21:30,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 21:21:30,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 21:21:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=2973, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:21:30,935 INFO L87 Difference]: Start difference. First operand 222 states and 260 transitions. Second operand 66 states. [2020-12-21 21:21:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:32,280 INFO L93 Difference]: Finished difference Result 369 states and 452 transitions. [2020-12-21 21:21:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 21:21:32,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 169 [2020-12-21 21:21:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:32,284 INFO L225 Difference]: With dead ends: 369 [2020-12-21 21:21:32,284 INFO L226 Difference]: Without dead ends: 236 [2020-12-21 21:21:32,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1695, Invalid=5277, Unknown=0, NotChecked=0, Total=6972 [2020-12-21 21:21:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-21 21:21:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-12-21 21:21:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-21 21:21:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 272 transitions. [2020-12-21 21:21:32,295 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 272 transitions. Word has length 169 [2020-12-21 21:21:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:32,296 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 272 transitions. [2020-12-21 21:21:32,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-21 21:21:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 272 transitions. [2020-12-21 21:21:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 21:21:32,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:32,297 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:32,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:21:32,512 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1396437123, now seen corresponding path program 34 times [2020-12-21 21:21:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:32,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052946] [2020-12-21 21:21:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:21:34,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052946] [2020-12-21 21:21:34,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008776777] [2020-12-21 21:21:34,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:34,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:34,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:21:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:21:34,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:34,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:21:34,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276034807] [2020-12-21 21:21:34,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:21:34,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:34,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:21:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:21:34,364 INFO L87 Difference]: Start difference. First operand 232 states and 272 transitions. Second operand 49 states. [2020-12-21 21:21:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:34,532 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-12-21 21:21:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:21:34,532 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2020-12-21 21:21:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:34,534 INFO L225 Difference]: With dead ends: 374 [2020-12-21 21:21:34,534 INFO L226 Difference]: Without dead ends: 235 [2020-12-21 21:21:34,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:21:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-21 21:21:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-12-21 21:21:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-21 21:21:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 274 transitions. [2020-12-21 21:21:34,544 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 274 transitions. Word has length 176 [2020-12-21 21:21:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:34,544 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 274 transitions. [2020-12-21 21:21:34,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:21:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 274 transitions. [2020-12-21 21:21:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-21 21:21:34,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:34,546 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:34,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-21 21:21:34,761 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:34,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2121693311, now seen corresponding path program 35 times [2020-12-21 21:21:34,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:34,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584186214] [2020-12-21 21:21:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:21:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584186214] [2020-12-21 21:21:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150181654] [2020-12-21 21:21:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:20,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-21 21:22:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:20,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:22:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-12-21 21:22:21,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:21,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21] total 68 [2020-12-21 21:22:21,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078884643] [2020-12-21 21:22:21,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 21:22:21,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 21:22:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:21,536 INFO L87 Difference]: Start difference. First operand 234 states and 274 transitions. Second operand 68 states. [2020-12-21 21:22:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:21,983 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2020-12-21 21:22:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-21 21:22:21,984 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 178 [2020-12-21 21:22:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:21,985 INFO L225 Difference]: With dead ends: 386 [2020-12-21 21:22:21,985 INFO L226 Difference]: Without dead ends: 247 [2020-12-21 21:22:21,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 21:22:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-21 21:22:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2020-12-21 21:22:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-21 21:22:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2020-12-21 21:22:21,996 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 178 [2020-12-21 21:22:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:21,996 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2020-12-21 21:22:21,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 21:22:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2020-12-21 21:22:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-21 21:22:21,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:21,998 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 19, 19, 19, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:22,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-21 21:22:22,213 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash -226462307, now seen corresponding path program 36 times [2020-12-21 21:22:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:22,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315044634] [2020-12-21 21:22:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2020-12-21 21:22:23,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315044634] [2020-12-21 21:22:23,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292927427] [2020-12-21 21:22:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:34,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-21 21:22:34,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-21 21:22:34,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:35,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:22:35,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:22:35,703 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:22:35,705 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:22:35,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:22:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 1 proven. 850 refuted. 0 times theorem prover too weak. 1941 trivial. 0 not checked. [2020-12-21 21:22:35,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:35,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 74 [2020-12-21 21:22:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787647637] [2020-12-21 21:22:35,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-21 21:22:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-21 21:22:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=3882, Unknown=0, NotChecked=0, Total=5402 [2020-12-21 21:22:35,844 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand 74 states. [2020-12-21 21:22:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:38,939 INFO L93 Difference]: Finished difference Result 482 states and 596 transitions. [2020-12-21 21:22:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-21 21:22:38,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 183 [2020-12-21 21:22:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:38,942 INFO L225 Difference]: With dead ends: 482 [2020-12-21 21:22:38,942 INFO L226 Difference]: Without dead ends: 337 [2020-12-21 21:22:38,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1600, Invalid=6056, Unknown=0, NotChecked=0, Total=7656 [2020-12-21 21:22:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-21 21:22:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2020-12-21 21:22:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-21 21:22:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 290 transitions. [2020-12-21 21:22:38,956 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 290 transitions. Word has length 183 [2020-12-21 21:22:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:38,956 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 290 transitions. [2020-12-21 21:22:38,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-21 21:22:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 290 transitions. [2020-12-21 21:22:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-21 21:22:38,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:38,958 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:39,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:39,174 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1407592879, now seen corresponding path program 37 times [2020-12-21 21:22:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807304955] [2020-12-21 21:22:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-21 21:22:40,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807304955] [2020-12-21 21:22:40,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862039001] [2020-12-21 21:22:40,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:41,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-21 21:22:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-21 21:22:41,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:41,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-21 21:22:41,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805298922] [2020-12-21 21:22:41,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:22:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:41,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:22:41,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:41,240 INFO L87 Difference]: Start difference. First operand 248 states and 290 transitions. Second operand 52 states. [2020-12-21 21:22:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:41,435 INFO L93 Difference]: Finished difference Result 400 states and 484 transitions. [2020-12-21 21:22:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-21 21:22:41,436 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 189 [2020-12-21 21:22:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:41,437 INFO L225 Difference]: With dead ends: 400 [2020-12-21 21:22:41,437 INFO L226 Difference]: Without dead ends: 251 [2020-12-21 21:22:41,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-21 21:22:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2020-12-21 21:22:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-21 21:22:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 292 transitions. [2020-12-21 21:22:41,450 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 292 transitions. Word has length 189 [2020-12-21 21:22:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:41,450 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 292 transitions. [2020-12-21 21:22:41,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:22:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 292 transitions. [2020-12-21 21:22:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 21:22:41,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:41,452 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:41,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:22:41,665 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1729470607, now seen corresponding path program 38 times [2020-12-21 21:22:41,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:41,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996341510] [2020-12-21 21:22:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-21 21:22:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996341510] [2020-12-21 21:22:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072312375] [2020-12-21 21:22:43,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:43,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:43,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:22:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-21 21:22:43,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:43,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-21 21:22:43,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411856693] [2020-12-21 21:22:43,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:22:43,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:22:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:43,802 INFO L87 Difference]: Start difference. First operand 250 states and 292 transitions. Second operand 53 states. [2020-12-21 21:22:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:43,987 INFO L93 Difference]: Finished difference Result 402 states and 486 transitions. [2020-12-21 21:22:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:22:43,988 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-21 21:22:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:43,989 INFO L225 Difference]: With dead ends: 402 [2020-12-21 21:22:43,989 INFO L226 Difference]: Without dead ends: 253 [2020-12-21 21:22:43,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-21 21:22:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-12-21 21:22:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-21 21:22:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 294 transitions. [2020-12-21 21:22:44,005 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 294 transitions. Word has length 191 [2020-12-21 21:22:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:44,006 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 294 transitions. [2020-12-21 21:22:44,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:22:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 294 transitions. [2020-12-21 21:22:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-21 21:22:44,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:44,007 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:44,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:22:44,220 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1380438861, now seen corresponding path program 39 times [2020-12-21 21:22:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619642073] [2020-12-21 21:22:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-21 21:22:46,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619642073] [2020-12-21 21:22:46,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61202335] [2020-12-21 21:22:46,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-21 21:22:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:22:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 100 proven. 532 refuted. 0 times theorem prover too weak. 2473 trivial. 0 not checked. [2020-12-21 21:22:47,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:47,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 24] total 75 [2020-12-21 21:22:47,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095644016] [2020-12-21 21:22:47,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-21 21:22:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:47,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-21 21:22:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=3835, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 21:22:47,897 INFO L87 Difference]: Start difference. First operand 252 states and 294 transitions. Second operand 75 states. [2020-12-21 21:22:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:49,462 INFO L93 Difference]: Finished difference Result 415 states and 506 transitions. [2020-12-21 21:22:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-21 21:22:49,463 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 193 [2020-12-21 21:22:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:49,464 INFO L225 Difference]: With dead ends: 415 [2020-12-21 21:22:49,465 INFO L226 Difference]: Without dead ends: 266 [2020-12-21 21:22:49,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2175, Invalid=6755, Unknown=0, NotChecked=0, Total=8930 [2020-12-21 21:22:49,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-21 21:22:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-21 21:22:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-21 21:22:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2020-12-21 21:22:49,477 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 193 [2020-12-21 21:22:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:49,478 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2020-12-21 21:22:49,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-21 21:22:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2020-12-21 21:22:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-21 21:22:49,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:49,479 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:49,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:49,695 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:49,696 INFO L82 PathProgramCache]: Analyzing trace with hash 420994817, now seen corresponding path program 40 times [2020-12-21 21:22:49,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:49,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269019269] [2020-12-21 21:22:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-21 21:22:51,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269019269] [2020-12-21 21:22:51,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342849581] [2020-12-21 21:22:51,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:51,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:22:51,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-21 21:22:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-21 21:22:51,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:51,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-21 21:22:51,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39144237] [2020-12-21 21:22:51,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 21:22:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 21:22:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:22:51,969 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand 56 states. [2020-12-21 21:22:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:52,216 INFO L93 Difference]: Finished difference Result 420 states and 508 transitions. [2020-12-21 21:22:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-21 21:22:52,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 200 [2020-12-21 21:22:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:52,217 INFO L225 Difference]: With dead ends: 420 [2020-12-21 21:22:52,218 INFO L226 Difference]: Without dead ends: 265 [2020-12-21 21:22:52,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:22:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-21 21:22:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-12-21 21:22:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-21 21:22:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2020-12-21 21:22:52,231 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 200 [2020-12-21 21:22:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:52,231 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2020-12-21 21:22:52,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 21:22:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2020-12-21 21:22:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-21 21:22:52,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:52,233 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:52,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-21 21:22:52,447 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1287643651, now seen corresponding path program 41 times [2020-12-21 21:22:52,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:52,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020016308] [2020-12-21 21:22:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-21 21:22:54,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020016308] [2020-12-21 21:22:54,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700730624] [2020-12-21 21:22:54,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true