/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:38:53,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:38:53,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:38:53,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:38:53,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:38:53,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:38:53,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:38:53,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:38:53,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:38:53,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:38:53,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:38:53,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:38:53,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:38:53,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:38:53,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:38:53,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:38:53,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:38:53,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:38:53,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:38:53,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:38:53,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:38:53,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:38:53,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:38:53,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:38:53,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:38:53,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:38:53,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:38:53,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:38:53,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:38:53,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:38:53,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:38:53,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:38:53,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:38:53,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:38:53,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:38:53,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:38:53,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:38:53,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:38:53,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:38:53,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:38:53,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:38:53,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:38:53,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:38:53,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:38:53,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:38:53,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:38:53,531 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:38:53,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:38:53,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:38:53,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:38:53,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:38:53,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:38:53,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:38:53,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:38:53,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:38:53,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:38:53,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:38:53,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:38:53,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:38:53,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:38:53,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:38:53,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:38:53,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:38:53,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:38:53,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:38:53,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:38:53,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:38:53,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:38:53,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:38:53,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:38:53,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:38:53,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:38:53,918 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:38:53,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:38:53,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cda0b3f0/9e249a2e78dc4c9ab31926efafff5e42/FLAG9ec9504e5 [2020-12-22 07:38:54,636 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:38:54,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:38:54,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cda0b3f0/9e249a2e78dc4c9ab31926efafff5e42/FLAG9ec9504e5 [2020-12-22 07:38:54,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cda0b3f0/9e249a2e78dc4c9ab31926efafff5e42 [2020-12-22 07:38:54,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:38:54,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:38:54,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:38:54,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:38:54,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:38:54,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:38:54" (1/1) ... [2020-12-22 07:38:54,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eee27ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:54, skipping insertion in model container [2020-12-22 07:38:54,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:38:54" (1/1) ... [2020-12-22 07:38:54,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:38:55,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:38:55,327 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2020-12-22 07:38:55,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:38:55,359 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:38:55,490 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2020-12-22 07:38:55,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:38:55,516 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:38:55,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55 WrapperNode [2020-12-22 07:38:55,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:38:55,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:38:55,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:38:55,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:38:55,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:38:55,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:38:55,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:38:55,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:38:55,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... [2020-12-22 07:38:55,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:38:55,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:38:55,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:38:55,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:38:55,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:38:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:38:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:38:55,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:38:55,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:38:56,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:38:56,770 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:38:56,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:38:56 BoogieIcfgContainer [2020-12-22 07:38:56,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:38:56,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:38:56,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:38:56,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:38:56,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:38:54" (1/3) ... [2020-12-22 07:38:56,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cca6484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:38:56, skipping insertion in model container [2020-12-22 07:38:56,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:38:55" (2/3) ... [2020-12-22 07:38:56,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cca6484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:38:56, skipping insertion in model container [2020-12-22 07:38:56,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:38:56" (3/3) ... [2020-12-22 07:38:56,782 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:38:56,788 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:38:56,794 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:38:56,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:38:56,841 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:38:56,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:38:56,841 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:38:56,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:38:56,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:38:56,842 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:38:56,842 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:38:56,842 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:38:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2020-12-22 07:38:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:38:56,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:56,876 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] [2020-12-22 07:38:56,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash -479003881, now seen corresponding path program 1 times [2020-12-22 07:38:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892358289] [2020-12-22 07:38:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:57,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892358289] [2020-12-22 07:38:57,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:57,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:38:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964514092] [2020-12-22 07:38:57,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:38:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:38:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:38:57,280 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 2 states. [2020-12-22 07:38:57,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:57,315 INFO L93 Difference]: Finished difference Result 221 states and 376 transitions. [2020-12-22 07:38:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:38:57,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:38:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:57,331 INFO L225 Difference]: With dead ends: 221 [2020-12-22 07:38:57,331 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 07:38:57,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:38:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 07:38:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-12-22 07:38:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 07:38:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2020-12-22 07:38:57,393 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2020-12-22 07:38:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:57,394 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2020-12-22 07:38:57,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:38:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2020-12-22 07:38:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:38:57,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:57,397 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] [2020-12-22 07:38:57,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:38:57,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1296652331, now seen corresponding path program 1 times [2020-12-22 07:38:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:57,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872424262] [2020-12-22 07:38:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:57,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872424262] [2020-12-22 07:38:57,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:57,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:38:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771297409] [2020-12-22 07:38:57,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:38:57,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:38:57,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:38:57,639 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand 5 states. [2020-12-22 07:38:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:57,784 INFO L93 Difference]: Finished difference Result 295 states and 499 transitions. [2020-12-22 07:38:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:38:57,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:38:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:57,788 INFO L225 Difference]: With dead ends: 295 [2020-12-22 07:38:57,789 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 07:38:57,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:38:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 07:38:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2020-12-22 07:38:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 07:38:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2020-12-22 07:38:57,806 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 37 [2020-12-22 07:38:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:57,806 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2020-12-22 07:38:57,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:38:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2020-12-22 07:38:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 07:38:57,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:57,810 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] [2020-12-22 07:38:57,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:38:57,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash 141893846, now seen corresponding path program 1 times [2020-12-22 07:38:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:57,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868982046] [2020-12-22 07:38:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:57,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868982046] [2020-12-22 07:38:57,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:57,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:57,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474685279] [2020-12-22 07:38:57,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:57,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:57,957 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand 3 states. [2020-12-22 07:38:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:58,012 INFO L93 Difference]: Finished difference Result 281 states and 453 transitions. [2020-12-22 07:38:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:58,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 07:38:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:58,016 INFO L225 Difference]: With dead ends: 281 [2020-12-22 07:38:58,016 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 07:38:58,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 07:38:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-12-22 07:38:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 07:38:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 314 transitions. [2020-12-22 07:38:58,034 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 314 transitions. Word has length 60 [2020-12-22 07:38:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:58,035 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 314 transitions. [2020-12-22 07:38:58,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 314 transitions. [2020-12-22 07:38:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:38:58,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:58,038 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] [2020-12-22 07:38:58,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:38:58,039 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:58,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -653639893, now seen corresponding path program 1 times [2020-12-22 07:38:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:58,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172487281] [2020-12-22 07:38:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:58,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172487281] [2020-12-22 07:38:58,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:58,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557999807] [2020-12-22 07:38:58,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:58,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:58,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:58,163 INFO L87 Difference]: Start difference. First operand 200 states and 314 transitions. Second operand 3 states. [2020-12-22 07:38:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:58,205 INFO L93 Difference]: Finished difference Result 476 states and 770 transitions. [2020-12-22 07:38:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:58,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 07:38:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:58,209 INFO L225 Difference]: With dead ends: 476 [2020-12-22 07:38:58,209 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 07:38:58,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 07:38:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2020-12-22 07:38:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 07:38:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2020-12-22 07:38:58,231 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 62 [2020-12-22 07:38:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:58,231 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2020-12-22 07:38:58,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2020-12-22 07:38:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:38:58,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:58,235 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 07:38:58,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:38:58,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:58,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1628052192, now seen corresponding path program 1 times [2020-12-22 07:38:58,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:58,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263767759] [2020-12-22 07:38:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:58,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263767759] [2020-12-22 07:38:58,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:58,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:58,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446353754] [2020-12-22 07:38:58,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:58,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:58,315 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand 3 states. [2020-12-22 07:38:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:58,350 INFO L93 Difference]: Finished difference Result 844 states and 1375 transitions. [2020-12-22 07:38:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:58,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:38:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:58,355 INFO L225 Difference]: With dead ends: 844 [2020-12-22 07:38:58,356 INFO L226 Difference]: Without dead ends: 570 [2020-12-22 07:38:58,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-12-22 07:38:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2020-12-22 07:38:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-12-22 07:38:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 917 transitions. [2020-12-22 07:38:58,383 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 917 transitions. Word has length 64 [2020-12-22 07:38:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:58,384 INFO L481 AbstractCegarLoop]: Abstraction has 568 states and 917 transitions. [2020-12-22 07:38:58,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 917 transitions. [2020-12-22 07:38:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:38:58,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:58,387 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 07:38:58,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:38:58,388 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:58,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1698900981, now seen corresponding path program 1 times [2020-12-22 07:38:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:58,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024392695] [2020-12-22 07:38:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:58,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024392695] [2020-12-22 07:38:58,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:58,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:38:58,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205666099] [2020-12-22 07:38:58,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:38:58,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:58,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:38:58,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:38:58,614 INFO L87 Difference]: Start difference. First operand 568 states and 917 transitions. Second operand 5 states. [2020-12-22 07:38:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:58,862 INFO L93 Difference]: Finished difference Result 2170 states and 3586 transitions. [2020-12-22 07:38:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:38:58,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 07:38:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:58,873 INFO L225 Difference]: With dead ends: 2170 [2020-12-22 07:38:58,873 INFO L226 Difference]: Without dead ends: 1656 [2020-12-22 07:38:58,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:38:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2020-12-22 07:38:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1017. [2020-12-22 07:38:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-12-22 07:38:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1655 transitions. [2020-12-22 07:38:58,925 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1655 transitions. Word has length 66 [2020-12-22 07:38:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:58,926 INFO L481 AbstractCegarLoop]: Abstraction has 1017 states and 1655 transitions. [2020-12-22 07:38:58,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:38:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1655 transitions. [2020-12-22 07:38:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:38:58,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:58,928 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] [2020-12-22 07:38:58,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:38:58,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash -796509765, now seen corresponding path program 1 times [2020-12-22 07:38:58,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:58,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771523117] [2020-12-22 07:38:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771523117] [2020-12-22 07:38:59,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:59,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:38:59,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969285453] [2020-12-22 07:38:59,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:38:59,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:59,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:38:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:38:59,003 INFO L87 Difference]: Start difference. First operand 1017 states and 1655 transitions. Second operand 4 states. [2020-12-22 07:38:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:59,142 INFO L93 Difference]: Finished difference Result 2966 states and 4892 transitions. [2020-12-22 07:38:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:38:59,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 07:38:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:59,154 INFO L225 Difference]: With dead ends: 2966 [2020-12-22 07:38:59,154 INFO L226 Difference]: Without dead ends: 2003 [2020-12-22 07:38:59,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:38:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2020-12-22 07:38:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1501. [2020-12-22 07:38:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1501 states. [2020-12-22 07:38:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2453 transitions. [2020-12-22 07:38:59,246 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2453 transitions. Word has length 67 [2020-12-22 07:38:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:59,247 INFO L481 AbstractCegarLoop]: Abstraction has 1501 states and 2453 transitions. [2020-12-22 07:38:59,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:38:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2453 transitions. [2020-12-22 07:38:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:38:59,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:59,249 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 07:38:59,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:38:59,250 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2022785868, now seen corresponding path program 1 times [2020-12-22 07:38:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:59,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977399455] [2020-12-22 07:38:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:59,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977399455] [2020-12-22 07:38:59,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:59,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:59,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910458502] [2020-12-22 07:38:59,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:59,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:59,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:59,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:59,309 INFO L87 Difference]: Start difference. First operand 1501 states and 2453 transitions. Second operand 3 states. [2020-12-22 07:38:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:59,386 INFO L93 Difference]: Finished difference Result 3316 states and 5473 transitions. [2020-12-22 07:38:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:59,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:38:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:59,398 INFO L225 Difference]: With dead ends: 3316 [2020-12-22 07:38:59,399 INFO L226 Difference]: Without dead ends: 2278 [2020-12-22 07:38:59,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2020-12-22 07:38:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2276. [2020-12-22 07:38:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2276 states. [2020-12-22 07:38:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3722 transitions. [2020-12-22 07:38:59,488 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3722 transitions. Word has length 68 [2020-12-22 07:38:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:59,489 INFO L481 AbstractCegarLoop]: Abstraction has 2276 states and 3722 transitions. [2020-12-22 07:38:59,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3722 transitions. [2020-12-22 07:38:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:38:59,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:59,490 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 07:38:59,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:38:59,491 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -675827220, now seen corresponding path program 1 times [2020-12-22 07:38:59,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:59,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603309596] [2020-12-22 07:38:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:59,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603309596] [2020-12-22 07:38:59,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:59,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:38:59,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381948136] [2020-12-22 07:38:59,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:38:59,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:38:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:38:59,562 INFO L87 Difference]: Start difference. First operand 2276 states and 3722 transitions. Second operand 4 states. [2020-12-22 07:38:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:59,785 INFO L93 Difference]: Finished difference Result 6680 states and 10988 transitions. [2020-12-22 07:38:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:38:59,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-12-22 07:38:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:59,809 INFO L225 Difference]: With dead ends: 6680 [2020-12-22 07:38:59,810 INFO L226 Difference]: Without dead ends: 4460 [2020-12-22 07:38:59,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:38:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2020-12-22 07:38:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3349. [2020-12-22 07:38:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3349 states. [2020-12-22 07:38:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 5462 transitions. [2020-12-22 07:38:59,959 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 5462 transitions. Word has length 68 [2020-12-22 07:38:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:59,959 INFO L481 AbstractCegarLoop]: Abstraction has 3349 states and 5462 transitions. [2020-12-22 07:38:59,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:38:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 5462 transitions. [2020-12-22 07:38:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:38:59,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:59,960 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 07:38:59,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:38:59,961 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -446846068, now seen corresponding path program 1 times [2020-12-22 07:38:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:59,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858845876] [2020-12-22 07:38:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858845876] [2020-12-22 07:39:00,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:00,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:00,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317742746] [2020-12-22 07:39:00,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:00,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:00,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:00,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:00,018 INFO L87 Difference]: Start difference. First operand 3349 states and 5462 transitions. Second operand 3 states. [2020-12-22 07:39:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:00,191 INFO L93 Difference]: Finished difference Result 6705 states and 10949 transitions. [2020-12-22 07:39:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:00,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:00,216 INFO L225 Difference]: With dead ends: 6705 [2020-12-22 07:39:00,216 INFO L226 Difference]: Without dead ends: 4777 [2020-12-22 07:39:00,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-12-22 07:39:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2020-12-22 07:39:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2020-12-22 07:39:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7737 transitions. [2020-12-22 07:39:00,415 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7737 transitions. Word has length 68 [2020-12-22 07:39:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:00,415 INFO L481 AbstractCegarLoop]: Abstraction has 4775 states and 7737 transitions. [2020-12-22 07:39:00,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7737 transitions. [2020-12-22 07:39:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:00,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:00,417 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 07:39:00,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:00,417 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1835740012, now seen corresponding path program 1 times [2020-12-22 07:39:00,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750905643] [2020-12-22 07:39:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:00,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750905643] [2020-12-22 07:39:00,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:00,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:00,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339986105] [2020-12-22 07:39:00,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:00,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:00,524 INFO L87 Difference]: Start difference. First operand 4775 states and 7737 transitions. Second operand 3 states. [2020-12-22 07:39:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:00,758 INFO L93 Difference]: Finished difference Result 10402 states and 16876 transitions. [2020-12-22 07:39:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:00,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:00,795 INFO L225 Difference]: With dead ends: 10402 [2020-12-22 07:39:00,796 INFO L226 Difference]: Without dead ends: 7073 [2020-12-22 07:39:00,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2020-12-22 07:39:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7071. [2020-12-22 07:39:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7071 states. [2020-12-22 07:39:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 11369 transitions. [2020-12-22 07:39:01,162 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 11369 transitions. Word has length 68 [2020-12-22 07:39:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:01,163 INFO L481 AbstractCegarLoop]: Abstraction has 7071 states and 11369 transitions. [2020-12-22 07:39:01,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 11369 transitions. [2020-12-22 07:39:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:39:01,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:01,164 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 07:39:01,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:01,164 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1060631278, now seen corresponding path program 1 times [2020-12-22 07:39:01,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:01,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875590217] [2020-12-22 07:39:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:01,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875590217] [2020-12-22 07:39:01,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:01,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:01,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247892004] [2020-12-22 07:39:01,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:01,270 INFO L87 Difference]: Start difference. First operand 7071 states and 11369 transitions. Second operand 4 states. [2020-12-22 07:39:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:01,858 INFO L93 Difference]: Finished difference Result 22178 states and 35738 transitions. [2020-12-22 07:39:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:01,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 07:39:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:01,920 INFO L225 Difference]: With dead ends: 22178 [2020-12-22 07:39:01,921 INFO L226 Difference]: Without dead ends: 15187 [2020-12-22 07:39:01,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:39:01,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15187 states. [2020-12-22 07:39:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15187 to 11086. [2020-12-22 07:39:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11086 states. [2020-12-22 07:39:02,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11086 states to 11086 states and 17718 transitions. [2020-12-22 07:39:02,647 INFO L78 Accepts]: Start accepts. Automaton has 11086 states and 17718 transitions. Word has length 69 [2020-12-22 07:39:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:02,648 INFO L481 AbstractCegarLoop]: Abstraction has 11086 states and 17718 transitions. [2020-12-22 07:39:02,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11086 states and 17718 transitions. [2020-12-22 07:39:02,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:39:02,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:02,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:02,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:02,650 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:02,650 INFO L82 PathProgramCache]: Analyzing trace with hash 808037418, now seen corresponding path program 1 times [2020-12-22 07:39:02,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:02,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766031477] [2020-12-22 07:39:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:02,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766031477] [2020-12-22 07:39:02,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:02,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:02,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305354277] [2020-12-22 07:39:02,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:02,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:02,810 INFO L87 Difference]: Start difference. First operand 11086 states and 17718 transitions. Second operand 4 states. [2020-12-22 07:39:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:03,688 INFO L93 Difference]: Finished difference Result 32753 states and 52282 transitions. [2020-12-22 07:39:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:03,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:39:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:03,842 INFO L225 Difference]: With dead ends: 32753 [2020-12-22 07:39:03,842 INFO L226 Difference]: Without dead ends: 21676 [2020-12-22 07:39:03,869 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 07:39:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21676 states. [2020-12-22 07:39:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21676 to 21674. [2020-12-22 07:39:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21674 states. [2020-12-22 07:39:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 34352 transitions. [2020-12-22 07:39:04,956 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 34352 transitions. Word has length 71 [2020-12-22 07:39:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:04,957 INFO L481 AbstractCegarLoop]: Abstraction has 21674 states and 34352 transitions. [2020-12-22 07:39:04,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 34352 transitions. [2020-12-22 07:39:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:04,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:04,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:04,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:04,961 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:04,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1928866513, now seen corresponding path program 1 times [2020-12-22 07:39:04,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:04,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449925055] [2020-12-22 07:39:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:05,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449925055] [2020-12-22 07:39:05,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:05,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:05,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396579241] [2020-12-22 07:39:05,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:05,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:05,031 INFO L87 Difference]: Start difference. First operand 21674 states and 34352 transitions. Second operand 3 states. [2020-12-22 07:39:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:06,144 INFO L93 Difference]: Finished difference Result 52569 states and 83812 transitions. [2020-12-22 07:39:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:06,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:39:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:06,211 INFO L225 Difference]: With dead ends: 52569 [2020-12-22 07:39:06,211 INFO L226 Difference]: Without dead ends: 31012 [2020-12-22 07:39:06,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31012 states. [2020-12-22 07:39:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31012 to 30100. [2020-12-22 07:39:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30100 states. [2020-12-22 07:39:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30100 states to 30100 states and 47575 transitions. [2020-12-22 07:39:07,687 INFO L78 Accepts]: Start accepts. Automaton has 30100 states and 47575 transitions. Word has length 72 [2020-12-22 07:39:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:07,687 INFO L481 AbstractCegarLoop]: Abstraction has 30100 states and 47575 transitions. [2020-12-22 07:39:07,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 30100 states and 47575 transitions. [2020-12-22 07:39:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:07,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:07,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:07,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:39:07,689 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1731694218, now seen corresponding path program 1 times [2020-12-22 07:39:07,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:07,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865497353] [2020-12-22 07:39:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:07,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865497353] [2020-12-22 07:39:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:07,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72956621] [2020-12-22 07:39:07,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:07,729 INFO L87 Difference]: Start difference. First operand 30100 states and 47575 transitions. Second operand 3 states. [2020-12-22 07:39:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:09,781 INFO L93 Difference]: Finished difference Result 90262 states and 142663 transitions. [2020-12-22 07:39:09,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:09,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:39:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:09,932 INFO L225 Difference]: With dead ends: 90262 [2020-12-22 07:39:09,932 INFO L226 Difference]: Without dead ends: 60190 [2020-12-22 07:39:09,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60190 states. [2020-12-22 07:39:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60190 to 30102. [2020-12-22 07:39:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30102 states. [2020-12-22 07:39:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30102 states to 30102 states and 47577 transitions. [2020-12-22 07:39:11,487 INFO L78 Accepts]: Start accepts. Automaton has 30102 states and 47577 transitions. Word has length 72 [2020-12-22 07:39:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:11,487 INFO L481 AbstractCegarLoop]: Abstraction has 30102 states and 47577 transitions. [2020-12-22 07:39:11,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 30102 states and 47577 transitions. [2020-12-22 07:39:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:11,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:11,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:39:11,489 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash -337778154, now seen corresponding path program 1 times [2020-12-22 07:39:11,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:11,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994900771] [2020-12-22 07:39:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:11,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994900771] [2020-12-22 07:39:11,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:11,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:11,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883716787] [2020-12-22 07:39:11,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:11,757 INFO L87 Difference]: Start difference. First operand 30102 states and 47577 transitions. Second operand 4 states. [2020-12-22 07:39:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:13,494 INFO L93 Difference]: Finished difference Result 88948 states and 140409 transitions. [2020-12-22 07:39:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:13,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:13,590 INFO L225 Difference]: With dead ends: 88948 [2020-12-22 07:39:13,590 INFO L226 Difference]: Without dead ends: 58876 [2020-12-22 07:39:13,629 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 07:39:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58876 states. [2020-12-22 07:39:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58876 to 58874. [2020-12-22 07:39:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58874 states. [2020-12-22 07:39:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58874 states to 58874 states and 92320 transitions. [2020-12-22 07:39:16,015 INFO L78 Accepts]: Start accepts. Automaton has 58874 states and 92320 transitions. Word has length 73 [2020-12-22 07:39:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:16,016 INFO L481 AbstractCegarLoop]: Abstraction has 58874 states and 92320 transitions. [2020-12-22 07:39:16,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 58874 states and 92320 transitions. [2020-12-22 07:39:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:16,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:16,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:16,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:39:16,018 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1275444434, now seen corresponding path program 1 times [2020-12-22 07:39:16,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:16,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023005696] [2020-12-22 07:39:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:16,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023005696] [2020-12-22 07:39:16,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:16,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220321526] [2020-12-22 07:39:16,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:16,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:16,085 INFO L87 Difference]: Start difference. First operand 58874 states and 92320 transitions. Second operand 3 states. [2020-12-22 07:39:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:19,199 INFO L93 Difference]: Finished difference Result 142442 states and 224184 transitions. [2020-12-22 07:39:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:19,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:19,336 INFO L225 Difference]: With dead ends: 142442 [2020-12-22 07:39:19,336 INFO L226 Difference]: Without dead ends: 83824 [2020-12-22 07:39:19,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83824 states. [2020-12-22 07:39:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83824 to 81518. [2020-12-22 07:39:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81518 states. [2020-12-22 07:39:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81518 states to 81518 states and 127222 transitions. [2020-12-22 07:39:22,705 INFO L78 Accepts]: Start accepts. Automaton has 81518 states and 127222 transitions. Word has length 74 [2020-12-22 07:39:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:22,705 INFO L481 AbstractCegarLoop]: Abstraction has 81518 states and 127222 transitions. [2020-12-22 07:39:22,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 81518 states and 127222 transitions. [2020-12-22 07:39:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:22,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:22,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:22,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:39:22,707 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:22,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2143634658, now seen corresponding path program 1 times [2020-12-22 07:39:22,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:22,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760973854] [2020-12-22 07:39:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:22,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760973854] [2020-12-22 07:39:22,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:22,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:22,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405760551] [2020-12-22 07:39:22,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:22,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:22,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:22,747 INFO L87 Difference]: Start difference. First operand 81518 states and 127222 transitions. Second operand 3 states. [2020-12-22 07:39:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:27,611 INFO L93 Difference]: Finished difference Result 244478 states and 381546 transitions. [2020-12-22 07:39:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:27,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:27,926 INFO L225 Difference]: With dead ends: 244478 [2020-12-22 07:39:27,926 INFO L226 Difference]: Without dead ends: 163004 [2020-12-22 07:39:28,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163004 states. [2020-12-22 07:39:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163004 to 81522. [2020-12-22 07:39:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81522 states. [2020-12-22 07:39:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81522 states to 81522 states and 127226 transitions. [2020-12-22 07:39:32,000 INFO L78 Accepts]: Start accepts. Automaton has 81522 states and 127226 transitions. Word has length 74 [2020-12-22 07:39:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:32,001 INFO L481 AbstractCegarLoop]: Abstraction has 81522 states and 127226 transitions. [2020-12-22 07:39:32,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 81522 states and 127226 transitions. [2020-12-22 07:39:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:39:32,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:32,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:32,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:39:32,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash 102231554, now seen corresponding path program 1 times [2020-12-22 07:39:32,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:32,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136438606] [2020-12-22 07:39:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:32,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136438606] [2020-12-22 07:39:32,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:32,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:32,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077168904] [2020-12-22 07:39:32,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:32,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:32,096 INFO L87 Difference]: Start difference. First operand 81522 states and 127226 transitions. Second operand 4 states. [2020-12-22 07:39:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:37,634 INFO L93 Difference]: Finished difference Result 240818 states and 375274 transitions. [2020-12-22 07:39:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:37,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:39:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:38,087 INFO L225 Difference]: With dead ends: 240818 [2020-12-22 07:39:38,088 INFO L226 Difference]: Without dead ends: 159344 [2020-12-22 07:39:38,154 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 07:39:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159344 states. [2020-12-22 07:39:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159344 to 159342. [2020-12-22 07:39:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159342 states. [2020-12-22 07:39:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159342 states to 159342 states and 246552 transitions. [2020-12-22 07:39:44,982 INFO L78 Accepts]: Start accepts. Automaton has 159342 states and 246552 transitions. Word has length 75 [2020-12-22 07:39:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:44,983 INFO L481 AbstractCegarLoop]: Abstraction has 159342 states and 246552 transitions. [2020-12-22 07:39:44,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 159342 states and 246552 transitions. [2020-12-22 07:39:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:44,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:44,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:44,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:39:44,986 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1897914443, now seen corresponding path program 1 times [2020-12-22 07:39:44,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:44,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225320083] [2020-12-22 07:39:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:45,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225320083] [2020-12-22 07:39:45,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:45,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565650865] [2020-12-22 07:39:45,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:45,042 INFO L87 Difference]: Start difference. First operand 159342 states and 246552 transitions. Second operand 3 states. [2020-12-22 07:39:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:53,782 INFO L93 Difference]: Finished difference Result 386266 states and 600602 transitions. [2020-12-22 07:39:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:53,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:54,304 INFO L225 Difference]: With dead ends: 386266 [2020-12-22 07:39:54,305 INFO L226 Difference]: Without dead ends: 227440 [2020-12-22 07:39:54,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227440 states. [2020-12-22 07:40:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227440 to 220238. [2020-12-22 07:40:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220238 states. [2020-12-22 07:40:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220238 states to 220238 states and 338560 transitions. [2020-12-22 07:40:05,031 INFO L78 Accepts]: Start accepts. Automaton has 220238 states and 338560 transitions. Word has length 76 [2020-12-22 07:40:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:05,032 INFO L481 AbstractCegarLoop]: Abstraction has 220238 states and 338560 transitions. [2020-12-22 07:40:05,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 220238 states and 338560 transitions. [2020-12-22 07:40:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:40:05,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:05,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:05,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:05,034 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1851212210, now seen corresponding path program 1 times [2020-12-22 07:40:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:05,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091999815] [2020-12-22 07:40:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091999815] [2020-12-22 07:40:05,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:05,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863039106] [2020-12-22 07:40:05,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:05,081 INFO L87 Difference]: Start difference. First operand 220238 states and 338560 transitions. Second operand 3 states. [2020-12-22 07:40:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:20,945 INFO L93 Difference]: Finished difference Result 660314 states and 1015158 transitions. [2020-12-22 07:40:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:20,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:40:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:22,279 INFO L225 Difference]: With dead ends: 660314 [2020-12-22 07:40:22,279 INFO L226 Difference]: Without dead ends: 440384 [2020-12-22 07:40:22,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440384 states. [2020-12-22 07:40:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440384 to 220246. [2020-12-22 07:40:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220246 states. [2020-12-22 07:40:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220246 states to 220246 states and 338568 transitions. [2020-12-22 07:40:35,541 INFO L78 Accepts]: Start accepts. Automaton has 220246 states and 338568 transitions. Word has length 76 [2020-12-22 07:40:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:35,542 INFO L481 AbstractCegarLoop]: Abstraction has 220246 states and 338568 transitions. [2020-12-22 07:40:35,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 220246 states and 338568 transitions. [2020-12-22 07:40:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:40:35,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:35,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:35,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:40:35,562 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2120268233, now seen corresponding path program 1 times [2020-12-22 07:40:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:35,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48866873] [2020-12-22 07:40:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:35,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48866873] [2020-12-22 07:40:35,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:35,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:40:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337267115] [2020-12-22 07:40:35,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:40:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:40:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:35,736 INFO L87 Difference]: Start difference. First operand 220246 states and 338568 transitions. Second operand 5 states. [2020-12-22 07:40:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:54,025 INFO L93 Difference]: Finished difference Result 622384 states and 956113 transitions. [2020-12-22 07:40:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:54,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:40:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:55,006 INFO L225 Difference]: With dead ends: 622384 [2020-12-22 07:40:55,006 INFO L226 Difference]: Without dead ends: 402226 [2020-12-22 07:40:55,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402226 states. [2020-12-22 07:41:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402226 to 402224. [2020-12-22 07:41:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402224 states. [2020-12-22 07:41:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402224 states to 402224 states and 612689 transitions. [2020-12-22 07:41:16,266 INFO L78 Accepts]: Start accepts. Automaton has 402224 states and 612689 transitions. Word has length 77 [2020-12-22 07:41:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:16,266 INFO L481 AbstractCegarLoop]: Abstraction has 402224 states and 612689 transitions. [2020-12-22 07:41:16,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 402224 states and 612689 transitions. [2020-12-22 07:41:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:16,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:16,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:16,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:41:16,270 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:16,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983250, now seen corresponding path program 1 times [2020-12-22 07:41:16,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:16,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461740962] [2020-12-22 07:41:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:16,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461740962] [2020-12-22 07:41:16,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:16,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:16,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486276827] [2020-12-22 07:41:16,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:16,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:16,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:16,545 INFO L87 Difference]: Start difference. First operand 402224 states and 612689 transitions. Second operand 5 states. [2020-12-22 07:41:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:38,315 INFO L93 Difference]: Finished difference Result 866582 states and 1324212 transitions. [2020-12-22 07:41:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:41:38,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:41:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:39,675 INFO L225 Difference]: With dead ends: 866582 [2020-12-22 07:41:39,677 INFO L226 Difference]: Without dead ends: 465364 [2020-12-22 07:41:40,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465364 states. [2020-12-22 07:42:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465364 to 402224. [2020-12-22 07:42:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402224 states. [2020-12-22 07:42:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402224 states to 402224 states and 607593 transitions. [2020-12-22 07:42:03,707 INFO L78 Accepts]: Start accepts. Automaton has 402224 states and 607593 transitions. Word has length 77 [2020-12-22 07:42:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:03,707 INFO L481 AbstractCegarLoop]: Abstraction has 402224 states and 607593 transitions. [2020-12-22 07:42:03,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:42:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 402224 states and 607593 transitions. [2020-12-22 07:42:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:42:03,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:03,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:03,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:03,725 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1315913451, now seen corresponding path program 1 times [2020-12-22 07:42:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232359077] [2020-12-22 07:42:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:03,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232359077] [2020-12-22 07:42:03,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:03,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009042526] [2020-12-22 07:42:03,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:03,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:03,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:03,928 INFO L87 Difference]: Start difference. First operand 402224 states and 607593 transitions. Second operand 5 states.