/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:23:08,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:23:08,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:23:08,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:23:08,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:23:08,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:23:08,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:23:08,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:23:08,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:23:08,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:23:08,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:23:08,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:23:08,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:23:08,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:23:08,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:23:08,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:23:08,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:23:08,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:23:08,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:23:08,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:23:08,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:23:08,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:23:08,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:23:08,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:23:08,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:23:08,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:23:08,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:23:08,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:23:08,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:23:08,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:23:08,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:23:08,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:23:08,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:23:08,469 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:23:08,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:23:08,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:23:08,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:23:08,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:23:08,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:23:08,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:23:08,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:23:08,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:23:08,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:23:08,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:23:08,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:23:08,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:23:08,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:23:08,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:23:08,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:23:08,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:23:08,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:23:08,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:23:08,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:23:08,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:23:08,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:23:08,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:23:08,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:23:08,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:23:08,915 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:23:08,915 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:23:08,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:23:08,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51dad188c/6bdfbf464258434eb5980101dadc662e/FLAGbeaea0ab5 [2020-12-22 08:23:09,810 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:23:09,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:23:09,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51dad188c/6bdfbf464258434eb5980101dadc662e/FLAGbeaea0ab5 [2020-12-22 08:23:10,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51dad188c/6bdfbf464258434eb5980101dadc662e [2020-12-22 08:23:10,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:23:10,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:23:10,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:10,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:23:10,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:23:10,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773c3bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10, skipping insertion in model container [2020-12-22 08:23:10,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:23:10,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:23:10,374 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6703,6716] [2020-12-22 08:23:10,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:10,486 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:23:10,546 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6703,6716] [2020-12-22 08:23:10,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:23:10,633 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:23:10,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10 WrapperNode [2020-12-22 08:23:10,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:23:10,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:10,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:23:10,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:23:10,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:23:10,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:23:10,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:23:10,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:23:10,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... [2020-12-22 08:23:10,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:23:10,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:23:10,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:23:10,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:23:10,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:23:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:23:10,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:23:10,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:23:11,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:23:11,830 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:23:11,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:11 BoogieIcfgContainer [2020-12-22 08:23:11,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:23:11,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:23:11,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:23:11,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:23:11,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:23:10" (1/3) ... [2020-12-22 08:23:11,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed53cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:11, skipping insertion in model container [2020-12-22 08:23:11,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:23:10" (2/3) ... [2020-12-22 08:23:11,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed53cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:23:11, skipping insertion in model container [2020-12-22 08:23:11,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:23:11" (3/3) ... [2020-12-22 08:23:11,846 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:23:11,853 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:23:11,860 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:23:11,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:23:11,915 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:23:11,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:23:11,916 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:23:11,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:23:11,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:23:11,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:23:11,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:23:11,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:23:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-12-22 08:23:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:23:11,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:11,948 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] [2020-12-22 08:23:11,949 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash -113151096, now seen corresponding path program 1 times [2020-12-22 08:23:11,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:11,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149557133] [2020-12-22 08:23:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:12,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149557133] [2020-12-22 08:23:12,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:12,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258244267] [2020-12-22 08:23:12,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:12,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:12,435 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 3 states. [2020-12-22 08:23:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:12,547 INFO L93 Difference]: Finished difference Result 364 states and 598 transitions. [2020-12-22 08:23:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:12,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:23:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:12,565 INFO L225 Difference]: With dead ends: 364 [2020-12-22 08:23:12,565 INFO L226 Difference]: Without dead ends: 274 [2020-12-22 08:23:12,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-22 08:23:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2020-12-22 08:23:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-22 08:23:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 410 transitions. [2020-12-22 08:23:12,670 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 410 transitions. Word has length 64 [2020-12-22 08:23:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:12,671 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 410 transitions. [2020-12-22 08:23:12,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 410 transitions. [2020-12-22 08:23:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:23:12,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:12,678 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] [2020-12-22 08:23:12,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:23:12,679 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 507394196, now seen corresponding path program 1 times [2020-12-22 08:23:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296245217] [2020-12-22 08:23:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:13,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296245217] [2020-12-22 08:23:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:23:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47697174] [2020-12-22 08:23:13,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:13,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:13,040 INFO L87 Difference]: Start difference. First operand 272 states and 410 transitions. Second operand 6 states. [2020-12-22 08:23:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:13,395 INFO L93 Difference]: Finished difference Result 1002 states and 1550 transitions. [2020-12-22 08:23:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:13,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:23:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:13,405 INFO L225 Difference]: With dead ends: 1002 [2020-12-22 08:23:13,405 INFO L226 Difference]: Without dead ends: 792 [2020-12-22 08:23:13,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-12-22 08:23:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 786. [2020-12-22 08:23:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-12-22 08:23:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1206 transitions. [2020-12-22 08:23:13,522 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1206 transitions. Word has length 65 [2020-12-22 08:23:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:13,523 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 1206 transitions. [2020-12-22 08:23:13,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1206 transitions. [2020-12-22 08:23:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:13,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:13,532 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] [2020-12-22 08:23:13,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:23:13,533 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1175932082, now seen corresponding path program 1 times [2020-12-22 08:23:13,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:13,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703606849] [2020-12-22 08:23:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703606849] [2020-12-22 08:23:13,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:13,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147520471] [2020-12-22 08:23:13,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:13,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:13,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:13,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:13,762 INFO L87 Difference]: Start difference. First operand 786 states and 1206 transitions. Second operand 6 states. [2020-12-22 08:23:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:14,170 INFO L93 Difference]: Finished difference Result 2640 states and 4113 transitions. [2020-12-22 08:23:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:14,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:23:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:14,186 INFO L225 Difference]: With dead ends: 2640 [2020-12-22 08:23:14,186 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 08:23:14,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 08:23:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1900. [2020-12-22 08:23:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1900 states. [2020-12-22 08:23:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2951 transitions. [2020-12-22 08:23:14,343 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2951 transitions. Word has length 66 [2020-12-22 08:23:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:14,350 INFO L481 AbstractCegarLoop]: Abstraction has 1900 states and 2951 transitions. [2020-12-22 08:23:14,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2951 transitions. [2020-12-22 08:23:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:14,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:14,354 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] [2020-12-22 08:23:14,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:23:14,354 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 195420080, now seen corresponding path program 1 times [2020-12-22 08:23:14,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:14,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142448081] [2020-12-22 08:23:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:14,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142448081] [2020-12-22 08:23:14,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:14,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172622865] [2020-12-22 08:23:14,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:14,495 INFO L87 Difference]: Start difference. First operand 1900 states and 2951 transitions. Second operand 6 states. [2020-12-22 08:23:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:15,149 INFO L93 Difference]: Finished difference Result 6610 states and 10356 transitions. [2020-12-22 08:23:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:15,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:23:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:15,175 INFO L225 Difference]: With dead ends: 6610 [2020-12-22 08:23:15,175 INFO L226 Difference]: Without dead ends: 4810 [2020-12-22 08:23:15,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2020-12-22 08:23:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4370. [2020-12-22 08:23:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4370 states. [2020-12-22 08:23:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 6814 transitions. [2020-12-22 08:23:15,540 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 6814 transitions. Word has length 66 [2020-12-22 08:23:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:15,542 INFO L481 AbstractCegarLoop]: Abstraction has 4370 states and 6814 transitions. [2020-12-22 08:23:15,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 6814 transitions. [2020-12-22 08:23:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:15,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:15,544 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] [2020-12-22 08:23:15,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:23:15,545 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2140991135, now seen corresponding path program 1 times [2020-12-22 08:23:15,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:15,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707979210] [2020-12-22 08:23:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707979210] [2020-12-22 08:23:15,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:15,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447821971] [2020-12-22 08:23:15,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:23:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:23:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:15,701 INFO L87 Difference]: Start difference. First operand 4370 states and 6814 transitions. Second operand 6 states. [2020-12-22 08:23:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:16,729 INFO L93 Difference]: Finished difference Result 16439 states and 25701 transitions. [2020-12-22 08:23:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:16,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 08:23:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:16,796 INFO L225 Difference]: With dead ends: 16439 [2020-12-22 08:23:16,796 INFO L226 Difference]: Without dead ends: 12142 [2020-12-22 08:23:16,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:23:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2020-12-22 08:23:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 12138. [2020-12-22 08:23:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12138 states. [2020-12-22 08:23:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12138 states to 12138 states and 18894 transitions. [2020-12-22 08:23:17,690 INFO L78 Accepts]: Start accepts. Automaton has 12138 states and 18894 transitions. Word has length 66 [2020-12-22 08:23:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:17,690 INFO L481 AbstractCegarLoop]: Abstraction has 12138 states and 18894 transitions. [2020-12-22 08:23:17,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:23:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 12138 states and 18894 transitions. [2020-12-22 08:23:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:23:17,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:17,693 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] [2020-12-22 08:23:17,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:23:17,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash -472666691, now seen corresponding path program 1 times [2020-12-22 08:23:17,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:17,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065214273] [2020-12-22 08:23:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:17,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065214273] [2020-12-22 08:23:17,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:17,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:23:17,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428426300] [2020-12-22 08:23:17,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:17,793 INFO L87 Difference]: Start difference. First operand 12138 states and 18894 transitions. Second operand 5 states. [2020-12-22 08:23:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:19,402 INFO L93 Difference]: Finished difference Result 36102 states and 56266 transitions. [2020-12-22 08:23:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:19,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:23:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:19,477 INFO L225 Difference]: With dead ends: 36102 [2020-12-22 08:23:19,477 INFO L226 Difference]: Without dead ends: 23998 [2020-12-22 08:23:19,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:23:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23998 states. [2020-12-22 08:23:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23998 to 23996. [2020-12-22 08:23:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23996 states. [2020-12-22 08:23:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23996 states to 23996 states and 37065 transitions. [2020-12-22 08:23:21,049 INFO L78 Accepts]: Start accepts. Automaton has 23996 states and 37065 transitions. Word has length 66 [2020-12-22 08:23:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:21,049 INFO L481 AbstractCegarLoop]: Abstraction has 23996 states and 37065 transitions. [2020-12-22 08:23:21,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23996 states and 37065 transitions. [2020-12-22 08:23:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:23:21,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:21,053 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] [2020-12-22 08:23:21,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:23:21,054 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:21,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 545251456, now seen corresponding path program 1 times [2020-12-22 08:23:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:21,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259275430] [2020-12-22 08:23:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:21,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259275430] [2020-12-22 08:23:21,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833462458] [2020-12-22 08:23:21,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:21,141 INFO L87 Difference]: Start difference. First operand 23996 states and 37065 transitions. Second operand 5 states. [2020-12-22 08:23:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:23,323 INFO L93 Difference]: Finished difference Result 43966 states and 67489 transitions. [2020-12-22 08:23:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:23:23,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:23:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:23,441 INFO L225 Difference]: With dead ends: 43966 [2020-12-22 08:23:23,441 INFO L226 Difference]: Without dead ends: 43964 [2020-12-22 08:23:23,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:23:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43964 states. [2020-12-22 08:23:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43964 to 24392. [2020-12-22 08:23:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24392 states. [2020-12-22 08:23:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24392 states to 24392 states and 37461 transitions. [2020-12-22 08:23:25,155 INFO L78 Accepts]: Start accepts. Automaton has 24392 states and 37461 transitions. Word has length 67 [2020-12-22 08:23:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:25,155 INFO L481 AbstractCegarLoop]: Abstraction has 24392 states and 37461 transitions. [2020-12-22 08:23:25,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24392 states and 37461 transitions. [2020-12-22 08:23:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:23:25,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:25,170 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] [2020-12-22 08:23:25,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:23:25,171 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2333062, now seen corresponding path program 1 times [2020-12-22 08:23:25,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:25,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940231615] [2020-12-22 08:23:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:25,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940231615] [2020-12-22 08:23:25,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:25,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:23:25,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189261068] [2020-12-22 08:23:25,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:23:25,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:23:25,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:23:25,453 INFO L87 Difference]: Start difference. First operand 24392 states and 37461 transitions. Second operand 10 states. [2020-12-22 08:23:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:38,647 INFO L93 Difference]: Finished difference Result 197303 states and 303266 transitions. [2020-12-22 08:23:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:23:38,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:23:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:39,212 INFO L225 Difference]: With dead ends: 197303 [2020-12-22 08:23:39,213 INFO L226 Difference]: Without dead ends: 181193 [2020-12-22 08:23:39,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:23:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181193 states. [2020-12-22 08:23:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181193 to 24552. [2020-12-22 08:23:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24552 states. [2020-12-22 08:23:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 37663 transitions. [2020-12-22 08:23:42,884 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 37663 transitions. Word has length 68 [2020-12-22 08:23:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:42,885 INFO L481 AbstractCegarLoop]: Abstraction has 24552 states and 37663 transitions. [2020-12-22 08:23:42,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:23:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 37663 transitions. [2020-12-22 08:23:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:23:42,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:42,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:42,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:23:42,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash -371480250, now seen corresponding path program 1 times [2020-12-22 08:23:42,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:42,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033105969] [2020-12-22 08:23:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033105969] [2020-12-22 08:23:43,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:43,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:23:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076435830] [2020-12-22 08:23:43,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:23:43,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:23:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:23:43,113 INFO L87 Difference]: Start difference. First operand 24552 states and 37663 transitions. Second operand 10 states. [2020-12-22 08:23:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:52,985 INFO L93 Difference]: Finished difference Result 99437 states and 151942 transitions. [2020-12-22 08:23:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 08:23:52,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:23:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:53,110 INFO L225 Difference]: With dead ends: 99437 [2020-12-22 08:23:53,111 INFO L226 Difference]: Without dead ends: 94315 [2020-12-22 08:23:53,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=871, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 08:23:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94315 states. [2020-12-22 08:23:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94315 to 24552. [2020-12-22 08:23:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24552 states. [2020-12-22 08:23:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 37661 transitions. [2020-12-22 08:23:56,073 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 37661 transitions. Word has length 68 [2020-12-22 08:23:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:56,073 INFO L481 AbstractCegarLoop]: Abstraction has 24552 states and 37661 transitions. [2020-12-22 08:23:56,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:23:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 37661 transitions. [2020-12-22 08:23:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:23:56,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:56,078 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] [2020-12-22 08:23:56,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:23:56,079 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2100624742, now seen corresponding path program 1 times [2020-12-22 08:23:56,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:56,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181885785] [2020-12-22 08:23:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:56,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181885785] [2020-12-22 08:23:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:23:56,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005627188] [2020-12-22 08:23:56,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:23:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:23:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:23:56,320 INFO L87 Difference]: Start difference. First operand 24552 states and 37661 transitions. Second operand 10 states. [2020-12-22 08:24:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:14,020 INFO L93 Difference]: Finished difference Result 163279 states and 250560 transitions. [2020-12-22 08:24:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:24:14,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:24:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:14,470 INFO L225 Difference]: With dead ends: 163279 [2020-12-22 08:24:14,470 INFO L226 Difference]: Without dead ends: 153719 [2020-12-22 08:24:14,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:24:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153719 states. [2020-12-22 08:24:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153719 to 24901. [2020-12-22 08:24:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24901 states. [2020-12-22 08:24:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24901 states to 24901 states and 38104 transitions. [2020-12-22 08:24:18,054 INFO L78 Accepts]: Start accepts. Automaton has 24901 states and 38104 transitions. Word has length 68 [2020-12-22 08:24:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:18,054 INFO L481 AbstractCegarLoop]: Abstraction has 24901 states and 38104 transitions. [2020-12-22 08:24:18,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:24:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 24901 states and 38104 transitions. [2020-12-22 08:24:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:24:18,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:18,060 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] [2020-12-22 08:24:18,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:24:18,060 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1059619418, now seen corresponding path program 1 times [2020-12-22 08:24:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:18,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959536218] [2020-12-22 08:24:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:18,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959536218] [2020-12-22 08:24:18,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:18,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:24:18,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173164519] [2020-12-22 08:24:18,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:24:18,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:24:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:24:18,268 INFO L87 Difference]: Start difference. First operand 24901 states and 38104 transitions. Second operand 10 states. [2020-12-22 08:24:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:39,369 INFO L93 Difference]: Finished difference Result 167993 states and 254779 transitions. [2020-12-22 08:24:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:24:39,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:24:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:39,595 INFO L225 Difference]: With dead ends: 167993 [2020-12-22 08:24:39,595 INFO L226 Difference]: Without dead ends: 144182 [2020-12-22 08:24:39,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:24:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144182 states. [2020-12-22 08:24:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144182 to 25035. [2020-12-22 08:24:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25035 states. [2020-12-22 08:24:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25035 states to 25035 states and 38248 transitions. [2020-12-22 08:24:43,920 INFO L78 Accepts]: Start accepts. Automaton has 25035 states and 38248 transitions. Word has length 68 [2020-12-22 08:24:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:43,920 INFO L481 AbstractCegarLoop]: Abstraction has 25035 states and 38248 transitions. [2020-12-22 08:24:43,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:24:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 25035 states and 38248 transitions. [2020-12-22 08:24:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:24:43,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:43,926 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] [2020-12-22 08:24:43,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:24:43,926 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1047773961, now seen corresponding path program 1 times [2020-12-22 08:24:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991067163] [2020-12-22 08:24:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:44,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991067163] [2020-12-22 08:24:44,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:44,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:24:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888900899] [2020-12-22 08:24:44,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:24:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:24:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:24:44,040 INFO L87 Difference]: Start difference. First operand 25035 states and 38248 transitions. Second operand 4 states. [2020-12-22 08:24:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:50,304 INFO L93 Difference]: Finished difference Result 68206 states and 104190 transitions. [2020-12-22 08:24:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:50,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 08:24:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:50,360 INFO L225 Difference]: With dead ends: 68206 [2020-12-22 08:24:50,360 INFO L226 Difference]: Without dead ends: 44744 [2020-12-22 08:24:50,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44744 states. [2020-12-22 08:24:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44744 to 44373. [2020-12-22 08:24:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44373 states. [2020-12-22 08:24:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44373 states to 44373 states and 67096 transitions. [2020-12-22 08:24:56,645 INFO L78 Accepts]: Start accepts. Automaton has 44373 states and 67096 transitions. Word has length 69 [2020-12-22 08:24:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:56,645 INFO L481 AbstractCegarLoop]: Abstraction has 44373 states and 67096 transitions. [2020-12-22 08:24:56,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:24:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44373 states and 67096 transitions. [2020-12-22 08:24:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:24:56,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:56,651 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] [2020-12-22 08:24:56,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:24:56,652 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1802228217, now seen corresponding path program 1 times [2020-12-22 08:24:56,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:56,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354960941] [2020-12-22 08:24:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:56,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354960941] [2020-12-22 08:24:56,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:56,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218463307] [2020-12-22 08:24:56,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:56,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:56,707 INFO L87 Difference]: Start difference. First operand 44373 states and 67096 transitions. Second operand 3 states. [2020-12-22 08:25:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:05,325 INFO L93 Difference]: Finished difference Result 79155 states and 119804 transitions. [2020-12-22 08:25:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:05,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:25:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:05,394 INFO L225 Difference]: With dead ends: 79155 [2020-12-22 08:25:05,394 INFO L226 Difference]: Without dead ends: 56633 [2020-12-22 08:25:05,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56633 states. [2020-12-22 08:25:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56633 to 55821. [2020-12-22 08:25:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55821 states. [2020-12-22 08:25:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55821 states to 55821 states and 83327 transitions. [2020-12-22 08:25:13,696 INFO L78 Accepts]: Start accepts. Automaton has 55821 states and 83327 transitions. Word has length 69 [2020-12-22 08:25:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:13,696 INFO L481 AbstractCegarLoop]: Abstraction has 55821 states and 83327 transitions. [2020-12-22 08:25:13,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 55821 states and 83327 transitions. [2020-12-22 08:25:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:25:13,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:13,701 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] [2020-12-22 08:25:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:25:13,702 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1041130329, now seen corresponding path program 1 times [2020-12-22 08:25:13,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:13,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257408350] [2020-12-22 08:25:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257408350] [2020-12-22 08:25:13,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:13,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065941149] [2020-12-22 08:25:13,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:13,767 INFO L87 Difference]: Start difference. First operand 55821 states and 83327 transitions. Second operand 3 states. [2020-12-22 08:25:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:28,350 INFO L93 Difference]: Finished difference Result 140197 states and 209682 transitions. [2020-12-22 08:25:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:28,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:25:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:28,477 INFO L225 Difference]: With dead ends: 140197 [2020-12-22 08:25:28,478 INFO L226 Difference]: Without dead ends: 93745 [2020-12-22 08:25:28,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93745 states. [2020-12-22 08:25:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93745 to 93539. [2020-12-22 08:25:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93539 states. [2020-12-22 08:25:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93539 states to 93539 states and 138687 transitions. [2020-12-22 08:25:42,922 INFO L78 Accepts]: Start accepts. Automaton has 93539 states and 138687 transitions. Word has length 69 [2020-12-22 08:25:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:42,922 INFO L481 AbstractCegarLoop]: Abstraction has 93539 states and 138687 transitions. [2020-12-22 08:25:42,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 93539 states and 138687 transitions. [2020-12-22 08:25:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:25:42,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:42,928 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] [2020-12-22 08:25:42,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:25:42,928 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash -933815240, now seen corresponding path program 1 times [2020-12-22 08:25:42,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:42,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967468765] [2020-12-22 08:25:42,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967468765] [2020-12-22 08:25:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889646171] [2020-12-22 08:25:42,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:42,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:42,987 INFO L87 Difference]: Start difference. First operand 93539 states and 138687 transitions. Second operand 3 states. [2020-12-22 08:25:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:59,825 INFO L93 Difference]: Finished difference Result 133996 states and 197730 transitions. [2020-12-22 08:25:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:59,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:25:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:59,987 INFO L225 Difference]: With dead ends: 133996 [2020-12-22 08:25:59,987 INFO L226 Difference]: Without dead ends: 106590 [2020-12-22 08:26:00,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106590 states. [2020-12-22 08:26:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106590 to 99595. [2020-12-22 08:26:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99595 states. [2020-12-22 08:26:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99595 states to 99595 states and 145173 transitions. [2020-12-22 08:26:16,103 INFO L78 Accepts]: Start accepts. Automaton has 99595 states and 145173 transitions. Word has length 69 [2020-12-22 08:26:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:16,104 INFO L481 AbstractCegarLoop]: Abstraction has 99595 states and 145173 transitions. [2020-12-22 08:26:16,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 99595 states and 145173 transitions. [2020-12-22 08:26:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:26:16,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:16,108 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] [2020-12-22 08:26:16,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:26:16,108 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 804290264, now seen corresponding path program 1 times [2020-12-22 08:26:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:16,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965493684] [2020-12-22 08:26:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:16,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965493684] [2020-12-22 08:26:16,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:16,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:26:16,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210358442] [2020-12-22 08:26:16,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:26:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:26:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:16,155 INFO L87 Difference]: Start difference. First operand 99595 states and 145173 transitions. Second operand 3 states. [2020-12-22 08:26:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:37,747 INFO L93 Difference]: Finished difference Result 213414 states and 310611 transitions. [2020-12-22 08:26:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:26:37,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:26:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:38,093 INFO L225 Difference]: With dead ends: 213414 [2020-12-22 08:26:38,093 INFO L226 Difference]: Without dead ends: 123709 [2020-12-22 08:26:38,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:26:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123709 states. [2020-12-22 08:26:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123709 to 122307. [2020-12-22 08:26:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122307 states. [2020-12-22 08:26:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122307 states to 122307 states and 174668 transitions. [2020-12-22 08:26:59,357 INFO L78 Accepts]: Start accepts. Automaton has 122307 states and 174668 transitions. Word has length 69 [2020-12-22 08:26:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:59,357 INFO L481 AbstractCegarLoop]: Abstraction has 122307 states and 174668 transitions. [2020-12-22 08:26:59,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:26:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 122307 states and 174668 transitions. [2020-12-22 08:26:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:59,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:59,360 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] [2020-12-22 08:26:59,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:26:59,360 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash -77781245, now seen corresponding path program 1 times [2020-12-22 08:26:59,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:59,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158715555] [2020-12-22 08:26:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158715555] [2020-12-22 08:26:59,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:59,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:59,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103307127] [2020-12-22 08:26:59,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:59,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:59,454 INFO L87 Difference]: Start difference. First operand 122307 states and 174668 transitions. Second operand 6 states.