/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:37:22,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:37:22,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:37:22,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:37:22,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:37:22,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:37:22,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:37:22,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:37:22,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:37:22,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:37:22,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:37:22,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:37:22,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:37:22,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:37:22,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:37:22,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:37:22,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:37:22,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:37:22,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:37:22,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:37:22,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:37:22,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:37:22,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:37:22,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:37:22,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:37:22,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:37:22,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:37:22,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:37:22,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:37:22,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:37:22,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:37:22,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:37:22,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:37:22,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:37:22,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:37:22,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:37:22,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:37:22,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:37:22,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:37:22,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:37:22,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:37:22,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:37:22,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:37:22,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:37:22,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:37:22,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:37:22,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:37:22,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:37:22,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:37:22,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:37:22,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:37:22,919 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:37:22,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2020-12-22 07:37:23,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bcd151/7f96067be38c42ac9a8320ff16bfe2bb/FLAG63171c1b3 [2020-12-22 07:37:23,778 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:37:23,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2020-12-22 07:37:23,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bcd151/7f96067be38c42ac9a8320ff16bfe2bb/FLAG63171c1b3 [2020-12-22 07:37:24,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bcd151/7f96067be38c42ac9a8320ff16bfe2bb [2020-12-22 07:37:24,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:37:24,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:37:24,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:37:24,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:37:24,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:37:24,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cbbb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24, skipping insertion in model container [2020-12-22 07:37:24,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:37:24,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:37:24,369 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2020-12-22 07:37:24,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:37:24,385 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:37:24,484 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2020-12-22 07:37:24,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:37:24,523 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:37:24,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24 WrapperNode [2020-12-22 07:37:24,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:37:24,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:37:24,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:37:24,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:37:24,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:37:24,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:37:24,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:37:24,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:37:24,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... [2020-12-22 07:37:24,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:37:24,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:37:24,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:37:24,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:37:24,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:37:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:37:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:37:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:37:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:37:25,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:37:25,710 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2020-12-22 07:37:25,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:37:25 BoogieIcfgContainer [2020-12-22 07:37:25,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:37:25,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:37:25,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:37:25,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:37:25,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:37:24" (1/3) ... [2020-12-22 07:37:25,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cb0271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:37:25, skipping insertion in model container [2020-12-22 07:37:25,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:37:24" (2/3) ... [2020-12-22 07:37:25,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cb0271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:37:25, skipping insertion in model container [2020-12-22 07:37:25,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:37:25" (3/3) ... [2020-12-22 07:37:25,725 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c [2020-12-22 07:37:25,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:37:25,740 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:37:25,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:37:25,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:37:25,828 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:37:25,828 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:37:25,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:37:25,829 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:37:25,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:37:25,829 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:37:25,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:37:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-12-22 07:37:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:37:25,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:25,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:25,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1880075128, now seen corresponding path program 1 times [2020-12-22 07:37:25,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:25,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603479960] [2020-12-22 07:37:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:26,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603479960] [2020-12-22 07:37:26,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:26,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:37:26,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346190080] [2020-12-22 07:37:26,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:37:26,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:37:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:37:26,264 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 2 states. [2020-12-22 07:37:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:26,301 INFO L93 Difference]: Finished difference Result 199 states and 337 transitions. [2020-12-22 07:37:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:37:26,303 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 41 [2020-12-22 07:37:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:26,332 INFO L225 Difference]: With dead ends: 199 [2020-12-22 07:37:26,334 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 07:37:26,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:37:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 07:37:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-22 07:37:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 07:37:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 216 transitions. [2020-12-22 07:37:26,419 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 216 transitions. Word has length 41 [2020-12-22 07:37:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:26,421 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 216 transitions. [2020-12-22 07:37:26,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:37:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 216 transitions. [2020-12-22 07:37:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:37:26,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:26,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:26,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:37:26,428 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2020525382, now seen corresponding path program 1 times [2020-12-22 07:37:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68396240] [2020-12-22 07:37:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:26,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68396240] [2020-12-22 07:37:26,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:26,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:37:26,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074281637] [2020-12-22 07:37:26,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:37:26,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:37:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:37:26,645 INFO L87 Difference]: Start difference. First operand 125 states and 216 transitions. Second operand 5 states. [2020-12-22 07:37:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:26,783 INFO L93 Difference]: Finished difference Result 198 states and 330 transitions. [2020-12-22 07:37:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:37:26,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 07:37:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:26,786 INFO L225 Difference]: With dead ends: 198 [2020-12-22 07:37:26,786 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 07:37:26,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:37:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 07:37:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-22 07:37:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 07:37:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2020-12-22 07:37:26,802 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 41 [2020-12-22 07:37:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:26,803 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2020-12-22 07:37:26,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:37:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2020-12-22 07:37:26,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 07:37:26,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:26,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:26,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:37:26,807 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1655570070, now seen corresponding path program 1 times [2020-12-22 07:37:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:26,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522149457] [2020-12-22 07:37:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:26,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522149457] [2020-12-22 07:37:26,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:26,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817000195] [2020-12-22 07:37:26,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:26,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:26,983 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 3 states. [2020-12-22 07:37:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:27,013 INFO L93 Difference]: Finished difference Result 257 states and 376 transitions. [2020-12-22 07:37:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:27,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 07:37:27,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:27,017 INFO L225 Difference]: With dead ends: 257 [2020-12-22 07:37:27,017 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 07:37:27,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 07:37:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 07:37:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 07:37:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 264 transitions. [2020-12-22 07:37:27,036 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 264 transitions. Word has length 90 [2020-12-22 07:37:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:27,037 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 264 transitions. [2020-12-22 07:37:27,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:27,037 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 264 transitions. [2020-12-22 07:37:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 07:37:27,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:27,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:27,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:37:27,039 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1317776928, now seen corresponding path program 1 times [2020-12-22 07:37:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:27,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014650923] [2020-12-22 07:37:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014650923] [2020-12-22 07:37:27,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:27,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:27,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831279779] [2020-12-22 07:37:27,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:27,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:27,207 INFO L87 Difference]: Start difference. First operand 186 states and 264 transitions. Second operand 3 states. [2020-12-22 07:37:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:27,237 INFO L93 Difference]: Finished difference Result 434 states and 660 transitions. [2020-12-22 07:37:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:27,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 07:37:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:27,245 INFO L225 Difference]: With dead ends: 434 [2020-12-22 07:37:27,246 INFO L226 Difference]: Without dead ends: 304 [2020-12-22 07:37:27,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-22 07:37:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2020-12-22 07:37:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 07:37:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 449 transitions. [2020-12-22 07:37:27,296 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 449 transitions. Word has length 90 [2020-12-22 07:37:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:27,297 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 449 transitions. [2020-12-22 07:37:27,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 449 transitions. [2020-12-22 07:37:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 07:37:27,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:27,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:27,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:37:27,299 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash -99791530, now seen corresponding path program 1 times [2020-12-22 07:37:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:27,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442819825] [2020-12-22 07:37:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:27,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442819825] [2020-12-22 07:37:27,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:27,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:37:27,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170347196] [2020-12-22 07:37:27,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:37:27,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:37:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:37:27,601 INFO L87 Difference]: Start difference. First operand 302 states and 449 transitions. Second operand 9 states. [2020-12-22 07:37:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:28,190 INFO L93 Difference]: Finished difference Result 3746 states and 5951 transitions. [2020-12-22 07:37:28,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:37:28,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2020-12-22 07:37:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:28,210 INFO L225 Difference]: With dead ends: 3746 [2020-12-22 07:37:28,211 INFO L226 Difference]: Without dead ends: 3500 [2020-12-22 07:37:28,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:37:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2020-12-22 07:37:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 546. [2020-12-22 07:37:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-12-22 07:37:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 833 transitions. [2020-12-22 07:37:28,280 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 833 transitions. Word has length 90 [2020-12-22 07:37:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:28,280 INFO L481 AbstractCegarLoop]: Abstraction has 546 states and 833 transitions. [2020-12-22 07:37:28,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:37:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 833 transitions. [2020-12-22 07:37:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:28,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:28,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:28,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:37:28,283 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:28,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1468897702, now seen corresponding path program 1 times [2020-12-22 07:37:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:28,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694563049] [2020-12-22 07:37:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:28,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694563049] [2020-12-22 07:37:28,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:28,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967422374] [2020-12-22 07:37:28,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:28,400 INFO L87 Difference]: Start difference. First operand 546 states and 833 transitions. Second operand 3 states. [2020-12-22 07:37:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:28,470 INFO L93 Difference]: Finished difference Result 1482 states and 2311 transitions. [2020-12-22 07:37:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:28,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 07:37:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:28,476 INFO L225 Difference]: With dead ends: 1482 [2020-12-22 07:37:28,476 INFO L226 Difference]: Without dead ends: 992 [2020-12-22 07:37:28,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-12-22 07:37:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 982. [2020-12-22 07:37:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-12-22 07:37:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1505 transitions. [2020-12-22 07:37:28,535 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1505 transitions. Word has length 92 [2020-12-22 07:37:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:28,535 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1505 transitions. [2020-12-22 07:37:28,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1505 transitions. [2020-12-22 07:37:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:28,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:28,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:37:28,538 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:28,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1535391214, now seen corresponding path program 1 times [2020-12-22 07:37:28,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:28,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104356598] [2020-12-22 07:37:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:28,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104356598] [2020-12-22 07:37:28,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:28,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:37:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446984760] [2020-12-22 07:37:28,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:37:28,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:37:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:37:28,979 INFO L87 Difference]: Start difference. First operand 982 states and 1505 transitions. Second operand 9 states. [2020-12-22 07:37:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:29,403 INFO L93 Difference]: Finished difference Result 2372 states and 3684 transitions. [2020-12-22 07:37:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:37:29,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 92 [2020-12-22 07:37:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:29,412 INFO L225 Difference]: With dead ends: 2372 [2020-12-22 07:37:29,412 INFO L226 Difference]: Without dead ends: 1446 [2020-12-22 07:37:29,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2020-12-22 07:37:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 982. [2020-12-22 07:37:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-12-22 07:37:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1497 transitions. [2020-12-22 07:37:29,496 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1497 transitions. Word has length 92 [2020-12-22 07:37:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:29,496 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1497 transitions. [2020-12-22 07:37:29,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:37:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1497 transitions. [2020-12-22 07:37:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:29,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:29,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:29,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:37:29,500 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash 550533322, now seen corresponding path program 1 times [2020-12-22 07:37:29,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:29,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416885277] [2020-12-22 07:37:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416885277] [2020-12-22 07:37:29,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:29,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845221797] [2020-12-22 07:37:29,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:29,603 INFO L87 Difference]: Start difference. First operand 982 states and 1497 transitions. Second operand 3 states. [2020-12-22 07:37:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:29,723 INFO L93 Difference]: Finished difference Result 2738 states and 4219 transitions. [2020-12-22 07:37:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:29,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 07:37:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:29,734 INFO L225 Difference]: With dead ends: 2738 [2020-12-22 07:37:29,734 INFO L226 Difference]: Without dead ends: 1812 [2020-12-22 07:37:29,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2020-12-22 07:37:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1810. [2020-12-22 07:37:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1810 states. [2020-12-22 07:37:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2761 transitions. [2020-12-22 07:37:29,870 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2761 transitions. Word has length 92 [2020-12-22 07:37:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:29,870 INFO L481 AbstractCegarLoop]: Abstraction has 1810 states and 2761 transitions. [2020-12-22 07:37:29,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2761 transitions. [2020-12-22 07:37:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:29,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:29,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:29,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:37:29,872 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1925362326, now seen corresponding path program 1 times [2020-12-22 07:37:29,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:29,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815175651] [2020-12-22 07:37:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:29,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815175651] [2020-12-22 07:37:29,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:29,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101753396] [2020-12-22 07:37:29,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:29,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:30,001 INFO L87 Difference]: Start difference. First operand 1810 states and 2761 transitions. Second operand 3 states. [2020-12-22 07:37:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:30,222 INFO L93 Difference]: Finished difference Result 5126 states and 7851 transitions. [2020-12-22 07:37:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:30,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 07:37:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:30,239 INFO L225 Difference]: With dead ends: 5126 [2020-12-22 07:37:30,239 INFO L226 Difference]: Without dead ends: 3372 [2020-12-22 07:37:30,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-12-22 07:37:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3370. [2020-12-22 07:37:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3370 states. [2020-12-22 07:37:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 5113 transitions. [2020-12-22 07:37:30,495 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 5113 transitions. Word has length 92 [2020-12-22 07:37:30,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:30,495 INFO L481 AbstractCegarLoop]: Abstraction has 3370 states and 5113 transitions. [2020-12-22 07:37:30,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 5113 transitions. [2020-12-22 07:37:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:30,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:30,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:30,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:37:30,501 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1745956342, now seen corresponding path program 1 times [2020-12-22 07:37:30,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:30,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307902716] [2020-12-22 07:37:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307902716] [2020-12-22 07:37:30,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:30,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123766696] [2020-12-22 07:37:30,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:30,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:30,582 INFO L87 Difference]: Start difference. First operand 3370 states and 5113 transitions. Second operand 3 states. [2020-12-22 07:37:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:30,977 INFO L93 Difference]: Finished difference Result 9614 states and 14587 transitions. [2020-12-22 07:37:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:30,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 07:37:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:31,016 INFO L225 Difference]: With dead ends: 9614 [2020-12-22 07:37:31,017 INFO L226 Difference]: Without dead ends: 6300 [2020-12-22 07:37:31,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2020-12-22 07:37:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 6298. [2020-12-22 07:37:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6298 states. [2020-12-22 07:37:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 9465 transitions. [2020-12-22 07:37:31,529 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 9465 transitions. Word has length 92 [2020-12-22 07:37:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:31,530 INFO L481 AbstractCegarLoop]: Abstraction has 6298 states and 9465 transitions. [2020-12-22 07:37:31,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 9465 transitions. [2020-12-22 07:37:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 07:37:31,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:31,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:31,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:37:31,532 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 789382826, now seen corresponding path program 1 times [2020-12-22 07:37:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:31,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429447341] [2020-12-22 07:37:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429447341] [2020-12-22 07:37:31,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:31,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940109670] [2020-12-22 07:37:31,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:31,610 INFO L87 Difference]: Start difference. First operand 6298 states and 9465 transitions. Second operand 3 states. [2020-12-22 07:37:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:32,316 INFO L93 Difference]: Finished difference Result 18014 states and 27003 transitions. [2020-12-22 07:37:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:32,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-12-22 07:37:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:32,389 INFO L225 Difference]: With dead ends: 18014 [2020-12-22 07:37:32,389 INFO L226 Difference]: Without dead ends: 11772 [2020-12-22 07:37:32,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11772 states. [2020-12-22 07:37:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11772 to 11770. [2020-12-22 07:37:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11770 states. [2020-12-22 07:37:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11770 states to 11770 states and 17465 transitions. [2020-12-22 07:37:33,272 INFO L78 Accepts]: Start accepts. Automaton has 11770 states and 17465 transitions. Word has length 92 [2020-12-22 07:37:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:33,272 INFO L481 AbstractCegarLoop]: Abstraction has 11770 states and 17465 transitions. [2020-12-22 07:37:33,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 11770 states and 17465 transitions. [2020-12-22 07:37:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:37:33,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:33,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:33,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:37:33,274 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:33,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:33,275 INFO L82 PathProgramCache]: Analyzing trace with hash -62235482, now seen corresponding path program 1 times [2020-12-22 07:37:33,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:33,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165682992] [2020-12-22 07:37:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:33,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165682992] [2020-12-22 07:37:33,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:33,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061798989] [2020-12-22 07:37:33,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:33,419 INFO L87 Difference]: Start difference. First operand 11770 states and 17465 transitions. Second operand 8 states. [2020-12-22 07:37:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:35,078 INFO L93 Difference]: Finished difference Result 20512 states and 30249 transitions. [2020-12-22 07:37:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:37:35,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-12-22 07:37:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:35,126 INFO L225 Difference]: With dead ends: 20512 [2020-12-22 07:37:35,126 INFO L226 Difference]: Without dead ends: 20510 [2020-12-22 07:37:35,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:37:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20510 states. [2020-12-22 07:37:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20510 to 12154. [2020-12-22 07:37:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12154 states. [2020-12-22 07:37:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12154 states to 12154 states and 17785 transitions. [2020-12-22 07:37:36,224 INFO L78 Accepts]: Start accepts. Automaton has 12154 states and 17785 transitions. Word has length 93 [2020-12-22 07:37:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:36,224 INFO L481 AbstractCegarLoop]: Abstraction has 12154 states and 17785 transitions. [2020-12-22 07:37:36,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 12154 states and 17785 transitions. [2020-12-22 07:37:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:37:36,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:36,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:36,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:37:36,226 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:36,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1252770917, now seen corresponding path program 1 times [2020-12-22 07:37:36,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:36,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3512113] [2020-12-22 07:37:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:37:36,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3512113] [2020-12-22 07:37:36,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:36,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:37:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598201523] [2020-12-22 07:37:36,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:37:36,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:37:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:36,340 INFO L87 Difference]: Start difference. First operand 12154 states and 17785 transitions. Second operand 3 states. [2020-12-22 07:37:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:37,753 INFO L93 Difference]: Finished difference Result 24449 states and 35967 transitions. [2020-12-22 07:37:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:37:37,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:37:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:37,797 INFO L225 Difference]: With dead ends: 24449 [2020-12-22 07:37:37,798 INFO L226 Difference]: Without dead ends: 17790 [2020-12-22 07:37:37,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:37:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17790 states. [2020-12-22 07:37:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17790 to 17788. [2020-12-22 07:37:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17788 states. [2020-12-22 07:37:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 25915 transitions. [2020-12-22 07:37:39,214 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 25915 transitions. Word has length 94 [2020-12-22 07:37:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:39,217 INFO L481 AbstractCegarLoop]: Abstraction has 17788 states and 25915 transitions. [2020-12-22 07:37:39,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:37:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 25915 transitions. [2020-12-22 07:37:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:37:39,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:39,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:39,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:37:39,230 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash -789894795, now seen corresponding path program 1 times [2020-12-22 07:37:39,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:39,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437699029] [2020-12-22 07:37:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 07:37:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437699029] [2020-12-22 07:37:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:39,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:37:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713720815] [2020-12-22 07:37:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:37:39,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:37:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:37:39,462 INFO L87 Difference]: Start difference. First operand 17788 states and 25915 transitions. Second operand 9 states. [2020-12-22 07:37:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:45,783 INFO L93 Difference]: Finished difference Result 145356 states and 211779 transitions. [2020-12-22 07:37:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:37:45,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:37:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:46,181 INFO L225 Difference]: With dead ends: 145356 [2020-12-22 07:37:46,181 INFO L226 Difference]: Without dead ends: 127626 [2020-12-22 07:37:46,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:37:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127626 states. [2020-12-22 07:37:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127626 to 35516. [2020-12-22 07:37:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35516 states. [2020-12-22 07:37:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35516 states to 35516 states and 51579 transitions. [2020-12-22 07:37:49,903 INFO L78 Accepts]: Start accepts. Automaton has 35516 states and 51579 transitions. Word has length 128 [2020-12-22 07:37:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:49,903 INFO L481 AbstractCegarLoop]: Abstraction has 35516 states and 51579 transitions. [2020-12-22 07:37:49,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:37:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35516 states and 51579 transitions. [2020-12-22 07:37:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:37:49,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:49,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:49,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:37:49,917 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1736289685, now seen corresponding path program 1 times [2020-12-22 07:37:49,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:49,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700017265] [2020-12-22 07:37:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 07:37:50,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700017265] [2020-12-22 07:37:50,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:50,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:37:50,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911791605] [2020-12-22 07:37:50,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:37:50,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:37:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:37:50,082 INFO L87 Difference]: Start difference. First operand 35516 states and 51579 transitions. Second operand 9 states. [2020-12-22 07:37:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:57,446 INFO L93 Difference]: Finished difference Result 163084 states and 237443 transitions. [2020-12-22 07:37:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:37:57,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:37:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:57,637 INFO L225 Difference]: With dead ends: 163084 [2020-12-22 07:37:57,637 INFO L226 Difference]: Without dead ends: 145354 [2020-12-22 07:37:57,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:37:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145354 states. [2020-12-22 07:38:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145354 to 62140. [2020-12-22 07:38:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62140 states. [2020-12-22 07:38:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62140 states to 62140 states and 89915 transitions. [2020-12-22 07:38:02,725 INFO L78 Accepts]: Start accepts. Automaton has 62140 states and 89915 transitions. Word has length 128 [2020-12-22 07:38:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:02,726 INFO L481 AbstractCegarLoop]: Abstraction has 62140 states and 89915 transitions. [2020-12-22 07:38:02,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:38:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 62140 states and 89915 transitions. [2020-12-22 07:38:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:38:02,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:02,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:02,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:38:02,743 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:02,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1672184255, now seen corresponding path program 1 times [2020-12-22 07:38:02,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:02,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722656974] [2020-12-22 07:38:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 07:38:02,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722656974] [2020-12-22 07:38:02,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:02,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:38:02,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550221787] [2020-12-22 07:38:02,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:38:02,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:38:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:38:02,906 INFO L87 Difference]: Start difference. First operand 62140 states and 89915 transitions. Second operand 9 states. [2020-12-22 07:38:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:11,611 INFO L93 Difference]: Finished difference Result 180812 states and 263107 transitions. [2020-12-22 07:38:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:38:11,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:38:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:11,956 INFO L225 Difference]: With dead ends: 180812 [2020-12-22 07:38:11,956 INFO L226 Difference]: Without dead ends: 163082 [2020-12-22 07:38:12,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:38:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163082 states. [2020-12-22 07:38:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163082 to 79868. [2020-12-22 07:38:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79868 states. [2020-12-22 07:38:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79868 states to 79868 states and 115579 transitions. [2020-12-22 07:38:17,840 INFO L78 Accepts]: Start accepts. Automaton has 79868 states and 115579 transitions. Word has length 128 [2020-12-22 07:38:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:17,840 INFO L481 AbstractCegarLoop]: Abstraction has 79868 states and 115579 transitions. [2020-12-22 07:38:17,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:38:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 79868 states and 115579 transitions. [2020-12-22 07:38:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:38:17,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:17,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:17,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:38:17,859 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -803711393, now seen corresponding path program 1 times [2020-12-22 07:38:17,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:17,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073293176] [2020-12-22 07:38:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:38:18,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073293176] [2020-12-22 07:38:18,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:18,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:38:18,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745578244] [2020-12-22 07:38:18,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:38:18,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:18,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:38:18,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:38:18,056 INFO L87 Difference]: Start difference. First operand 79868 states and 115579 transitions. Second operand 9 states. [2020-12-22 07:38:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:28,862 INFO L93 Difference]: Finished difference Result 198540 states and 288771 transitions. [2020-12-22 07:38:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:38:28,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:38:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:29,082 INFO L225 Difference]: With dead ends: 198540 [2020-12-22 07:38:29,083 INFO L226 Difference]: Without dead ends: 180810 [2020-12-22 07:38:29,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:38:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180810 states. [2020-12-22 07:38:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180810 to 97596. [2020-12-22 07:38:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97596 states. [2020-12-22 07:38:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97596 states to 97596 states and 141243 transitions. [2020-12-22 07:38:36,380 INFO L78 Accepts]: Start accepts. Automaton has 97596 states and 141243 transitions. Word has length 128 [2020-12-22 07:38:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:36,380 INFO L481 AbstractCegarLoop]: Abstraction has 97596 states and 141243 transitions. [2020-12-22 07:38:36,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:38:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 97596 states and 141243 transitions. [2020-12-22 07:38:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:38:36,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:36,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:36,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:38:36,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -624305409, now seen corresponding path program 1 times [2020-12-22 07:38:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:36,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956177758] [2020-12-22 07:38:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:38:36,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956177758] [2020-12-22 07:38:36,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:36,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:38:36,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961509480] [2020-12-22 07:38:36,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:38:36,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:38:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:38:36,560 INFO L87 Difference]: Start difference. First operand 97596 states and 141243 transitions. Second operand 9 states. [2020-12-22 07:38:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:50,174 INFO L93 Difference]: Finished difference Result 216268 states and 314435 transitions. [2020-12-22 07:38:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:38:50,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:38:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:50,608 INFO L225 Difference]: With dead ends: 216268 [2020-12-22 07:38:50,608 INFO L226 Difference]: Without dead ends: 198538 [2020-12-22 07:38:50,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:38:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198538 states. [2020-12-22 07:38:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198538 to 115324. [2020-12-22 07:38:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115324 states. [2020-12-22 07:38:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115324 states to 115324 states and 166907 transitions. [2020-12-22 07:38:59,987 INFO L78 Accepts]: Start accepts. Automaton has 115324 states and 166907 transitions. Word has length 128 [2020-12-22 07:38:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:59,988 INFO L481 AbstractCegarLoop]: Abstraction has 115324 states and 166907 transitions. [2020-12-22 07:38:59,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:38:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 115324 states and 166907 transitions. [2020-12-22 07:39:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:39:00,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:00,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:00,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:39:00,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1911033759, now seen corresponding path program 1 times [2020-12-22 07:39:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:00,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782672134] [2020-12-22 07:39:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:39:00,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782672134] [2020-12-22 07:39:00,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:00,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:39:00,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129782133] [2020-12-22 07:39:00,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:39:00,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:00,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:39:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:39:00,160 INFO L87 Difference]: Start difference. First operand 115324 states and 166907 transitions. Second operand 9 states. [2020-12-22 07:39:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:16,978 INFO L93 Difference]: Finished difference Result 233996 states and 340099 transitions. [2020-12-22 07:39:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:39:16,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-12-22 07:39:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:17,262 INFO L225 Difference]: With dead ends: 233996 [2020-12-22 07:39:17,263 INFO L226 Difference]: Without dead ends: 216266 [2020-12-22 07:39:17,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:39:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216266 states. [2020-12-22 07:39:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216266 to 133052. [2020-12-22 07:39:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133052 states. [2020-12-22 07:39:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133052 states to 133052 states and 192571 transitions. [2020-12-22 07:39:28,903 INFO L78 Accepts]: Start accepts. Automaton has 133052 states and 192571 transitions. Word has length 128 [2020-12-22 07:39:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:28,903 INFO L481 AbstractCegarLoop]: Abstraction has 133052 states and 192571 transitions. [2020-12-22 07:39:28,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:39:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 133052 states and 192571 transitions. [2020-12-22 07:39:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:39:28,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:28,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:28,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:39:28,929 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:28,930 INFO L82 PathProgramCache]: Analyzing trace with hash 21305626, now seen corresponding path program 1 times [2020-12-22 07:39:28,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:28,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084536359] [2020-12-22 07:39:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:39:29,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084536359] [2020-12-22 07:39:29,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:29,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:39:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978313633] [2020-12-22 07:39:29,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:39:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:39:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:39:29,096 INFO L87 Difference]: Start difference. First operand 133052 states and 192571 transitions. Second operand 9 states. [2020-12-22 07:39:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:49,196 INFO L93 Difference]: Finished difference Result 240844 states and 350147 transitions. [2020-12-22 07:39:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:39:49,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2020-12-22 07:39:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:49,723 INFO L225 Difference]: With dead ends: 240844 [2020-12-22 07:39:49,724 INFO L226 Difference]: Without dead ends: 228554 [2020-12-22 07:39:49,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:39:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228554 states. [2020-12-22 07:40:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228554 to 145340. [2020-12-22 07:40:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145340 states. [2020-12-22 07:40:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145340 states to 145340 states and 210491 transitions. [2020-12-22 07:40:03,543 INFO L78 Accepts]: Start accepts. Automaton has 145340 states and 210491 transitions. Word has length 130 [2020-12-22 07:40:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:03,544 INFO L481 AbstractCegarLoop]: Abstraction has 145340 states and 210491 transitions. [2020-12-22 07:40:03,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:40:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 145340 states and 210491 transitions. [2020-12-22 07:40:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:40:03,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:03,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:03,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:03,567 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:03,567 INFO L82 PathProgramCache]: Analyzing trace with hash -228882867, now seen corresponding path program 1 times [2020-12-22 07:40:03,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:03,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484476691] [2020-12-22 07:40:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:03,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484476691] [2020-12-22 07:40:03,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:03,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:03,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595661588] [2020-12-22 07:40:03,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:03,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:03,933 INFO L87 Difference]: Start difference. First operand 145340 states and 210491 transitions. Second operand 3 states. [2020-12-22 07:40:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:13,410 INFO L93 Difference]: Finished difference Result 249829 states and 362858 transitions. [2020-12-22 07:40:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:13,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 07:40:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:13,557 INFO L225 Difference]: With dead ends: 249829 [2020-12-22 07:40:13,557 INFO L226 Difference]: Without dead ends: 104547 [2020-12-22 07:40:13,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104547 states. [2020-12-22 07:40:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104547 to 104545. [2020-12-22 07:40:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104545 states. [2020-12-22 07:40:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104545 states to 104545 states and 151335 transitions. [2020-12-22 07:40:23,403 INFO L78 Accepts]: Start accepts. Automaton has 104545 states and 151335 transitions. Word has length 130 [2020-12-22 07:40:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:23,403 INFO L481 AbstractCegarLoop]: Abstraction has 104545 states and 151335 transitions. [2020-12-22 07:40:23,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104545 states and 151335 transitions. [2020-12-22 07:40:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:40:23,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:23,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:23,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:40:23,413 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 17347787, now seen corresponding path program 1 times [2020-12-22 07:40:23,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:23,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444634970] [2020-12-22 07:40:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444634970] [2020-12-22 07:40:23,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:23,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:23,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401787140] [2020-12-22 07:40:23,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:23,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:23,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:23,480 INFO L87 Difference]: Start difference. First operand 104545 states and 151335 transitions. Second operand 3 states. [2020-12-22 07:40:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:28,477 INFO L93 Difference]: Finished difference Result 156773 states and 226953 transitions. [2020-12-22 07:40:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:28,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:40:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:28,544 INFO L225 Difference]: With dead ends: 156773 [2020-12-22 07:40:28,544 INFO L226 Difference]: Without dead ends: 52323 [2020-12-22 07:40:28,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52323 states. [2020-12-22 07:40:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52323 to 52321. [2020-12-22 07:40:33,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52321 states. [2020-12-22 07:40:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52321 states to 52321 states and 75175 transitions. [2020-12-22 07:40:33,451 INFO L78 Accepts]: Start accepts. Automaton has 52321 states and 75175 transitions. Word has length 131 [2020-12-22 07:40:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:33,451 INFO L481 AbstractCegarLoop]: Abstraction has 52321 states and 75175 transitions. [2020-12-22 07:40:33,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 52321 states and 75175 transitions. [2020-12-22 07:40:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:40:33,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:33,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:33,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:40:33,457 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -992725759, now seen corresponding path program 1 times [2020-12-22 07:40:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:33,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480204790] [2020-12-22 07:40:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:33,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480204790] [2020-12-22 07:40:33,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541499172] [2020-12-22 07:40:33,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:33,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:33,549 INFO L87 Difference]: Start difference. First operand 52321 states and 75175 transitions. Second operand 3 states. [2020-12-22 07:40:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:36,072 INFO L93 Difference]: Finished difference Result 78437 states and 112713 transitions. [2020-12-22 07:40:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:36,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:40:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:36,095 INFO L225 Difference]: With dead ends: 78437 [2020-12-22 07:40:36,095 INFO L226 Difference]: Without dead ends: 26211 [2020-12-22 07:40:36,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26211 states. [2020-12-22 07:40:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26211 to 26209. [2020-12-22 07:40:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26209 states. [2020-12-22 07:40:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26209 states to 26209 states and 37367 transitions. [2020-12-22 07:40:38,434 INFO L78 Accepts]: Start accepts. Automaton has 26209 states and 37367 transitions. Word has length 131 [2020-12-22 07:40:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:38,434 INFO L481 AbstractCegarLoop]: Abstraction has 26209 states and 37367 transitions. [2020-12-22 07:40:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26209 states and 37367 transitions. [2020-12-22 07:40:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:40:38,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:38,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:38,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:40:38,438 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1386496055, now seen corresponding path program 1 times [2020-12-22 07:40:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:38,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734897069] [2020-12-22 07:40:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:38,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734897069] [2020-12-22 07:40:38,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:38,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152531484] [2020-12-22 07:40:38,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:38,507 INFO L87 Difference]: Start difference. First operand 26209 states and 37367 transitions. Second operand 3 states. [2020-12-22 07:40:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:39,965 INFO L93 Difference]: Finished difference Result 39269 states and 56001 transitions. [2020-12-22 07:40:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:39,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:40:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:39,979 INFO L225 Difference]: With dead ends: 39269 [2020-12-22 07:40:39,980 INFO L226 Difference]: Without dead ends: 13155 [2020-12-22 07:40:39,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2020-12-22 07:40:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 13153. [2020-12-22 07:40:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13153 states. [2020-12-22 07:40:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13153 states to 13153 states and 18599 transitions. [2020-12-22 07:40:41,349 INFO L78 Accepts]: Start accepts. Automaton has 13153 states and 18599 transitions. Word has length 131 [2020-12-22 07:40:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:41,350 INFO L481 AbstractCegarLoop]: Abstraction has 13153 states and 18599 transitions. [2020-12-22 07:40:41,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 13153 states and 18599 transitions. [2020-12-22 07:40:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:40:41,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:41,352 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:41,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:40:41,352 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -529115539, now seen corresponding path program 1 times [2020-12-22 07:40:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:41,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814669016] [2020-12-22 07:40:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814669016] [2020-12-22 07:40:41,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:41,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:41,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686917115] [2020-12-22 07:40:41,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:41,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:41,428 INFO L87 Difference]: Start difference. First operand 13153 states and 18599 transitions. Second operand 3 states. [2020-12-22 07:40:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:42,010 INFO L93 Difference]: Finished difference Result 19685 states and 27849 transitions. [2020-12-22 07:40:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:42,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:40:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:42,017 INFO L225 Difference]: With dead ends: 19685 [2020-12-22 07:40:42,017 INFO L226 Difference]: Without dead ends: 6627 [2020-12-22 07:40:42,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2020-12-22 07:40:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6625. [2020-12-22 07:40:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6625 states. [2020-12-22 07:40:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 9283 transitions. [2020-12-22 07:40:42,827 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 9283 transitions. Word has length 131 [2020-12-22 07:40:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:42,828 INFO L481 AbstractCegarLoop]: Abstraction has 6625 states and 9283 transitions. [2020-12-22 07:40:42,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 9283 transitions. [2020-12-22 07:40:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:40:42,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:42,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:42,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:40:42,830 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1057486755, now seen corresponding path program 1 times [2020-12-22 07:40:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:42,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108701235] [2020-12-22 07:40:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108701235] [2020-12-22 07:40:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467645175] [2020-12-22 07:40:43,498 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