/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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:42:00,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:42:00,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:42:00,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:42:00,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:42:00,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:42:00,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:42:00,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:42:00,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:42:00,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:42:00,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:42:00,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:42:00,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:42:00,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:42:00,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:42:00,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:42:00,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:42:00,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:42:00,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:42:00,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:42:00,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:42:00,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:42:00,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:42:00,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:42:00,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:42:00,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:42:00,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:42:00,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:42:00,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:42:00,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:42:00,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:42:00,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:42:00,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:42:00,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:42:00,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:42:00,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:42:00,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:42:00,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:42:00,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:42:00,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:42:00,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:42:00,992 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:42:00,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:42:00,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:42:00,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:42:00,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:42:00,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:42:00,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:42:00,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:42:00,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:42:00,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:42:00,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:42:00,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:42:00,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:42:00,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:42:00,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:42:00,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:42:00,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:42:00,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:42:00,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:42:00,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:42:00,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:42:00,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:42:01,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:42:01,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:42:01,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:42:01,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:42:01,461 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:42:01,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:42:01,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7de1e281/f99e128ad0884709aaeddc5707ce78fc/FLAGf1640c34c [2020-12-22 09:42:02,541 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:42:02,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:42:02,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7de1e281/f99e128ad0884709aaeddc5707ce78fc/FLAGf1640c34c [2020-12-22 09:42:02,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7de1e281/f99e128ad0884709aaeddc5707ce78fc [2020-12-22 09:42:02,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:42:03,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:42:03,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:42:03,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:42:03,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:42:03,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:42:02" (1/1) ... [2020-12-22 09:42:03,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@783259fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:03, skipping insertion in model container [2020-12-22 09:42:03,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:42:02" (1/1) ... [2020-12-22 09:42:03,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:42:03,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:42:03,644 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8821,8834] [2020-12-22 09:42:03,696 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14133,14146] [2020-12-22 09:42:04,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:42:04,652 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:42:04,716 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[8821,8834] [2020-12-22 09:42:04,730 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/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c[14133,14146] [2020-12-22 09:42:05,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:42:05,362 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:42:05,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05 WrapperNode [2020-12-22 09:42:05,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:42:05,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:42:05,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:42:05,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:42:05,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:05,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:05,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:42:05,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:42:05,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:42:05,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:42:05,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:05,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (1/1) ... [2020-12-22 09:42:06,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:42:06,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:42:06,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:42:06,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:42:06,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (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 09:42:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:42:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:42:06,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:42:06,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:42:12,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:42:12,300 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:42:12,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:12 BoogieIcfgContainer [2020-12-22 09:42:12,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:42:12,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:42:12,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:42:12,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:42:12,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:42:02" (1/3) ... [2020-12-22 09:42:12,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e16b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:12, skipping insertion in model container [2020-12-22 09:42:12,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:42:05" (2/3) ... [2020-12-22 09:42:12,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e16b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:42:12, skipping insertion in model container [2020-12-22 09:42:12,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:42:12" (3/3) ... [2020-12-22 09:42:12,318 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:42:12,325 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:42:12,331 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:42:12,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:42:12,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:42:12,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:42:12,403 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:42:12,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:42:12,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:42:12,403 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:42:12,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:42:12,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:42:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:42:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:12,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:12,453 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] [2020-12-22 09:42:12,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:12,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:12,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:42:12,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:12,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537227886] [2020-12-22 09:42:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:12,714 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 09:42:12,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537227886] [2020-12-22 09:42:12,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:12,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:42:12,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853854500] [2020-12-22 09:42:12,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:42:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:42:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:42:12,747 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:42:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:12,852 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:42:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:42:12,854 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:42:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:12,888 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:42:12,888 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:42:12,898 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 09:42:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:42:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:42:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:42:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:42:13,003 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:42:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:13,003 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:42:13,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:42:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:42:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:42:13,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:13,005 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] [2020-12-22 09:42:13,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:42:13,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:42:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:13,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154132555] [2020-12-22 09:42:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:13,129 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 09:42:13,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154132555] [2020-12-22 09:42:13,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:13,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:13,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926968572] [2020-12-22 09:42:13,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:13,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:13,134 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:42:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:13,238 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:42:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:42:13,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:42:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:13,244 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:42:13,244 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:42:13,246 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 09:42:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:42:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:42:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:42:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:42:13,278 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:42:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:13,278 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:42:13,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:42:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:42:13,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:13,282 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] [2020-12-22 09:42:13,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:42:13,283 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2085515115, now seen corresponding path program 1 times [2020-12-22 09:42:13,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:13,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043385443] [2020-12-22 09:42:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:13,486 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 09:42:13,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043385443] [2020-12-22 09:42:13,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:13,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928953549] [2020-12-22 09:42:13,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:42:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:42:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:42:13,489 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 4 states. [2020-12-22 09:42:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:25,174 INFO L93 Difference]: Finished difference Result 3083 states and 5848 transitions. [2020-12-22 09:42:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:42:25,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:42:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:25,189 INFO L225 Difference]: With dead ends: 3083 [2020-12-22 09:42:25,190 INFO L226 Difference]: Without dead ends: 2330 [2020-12-22 09:42:25,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2020-12-22 09:42:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2330. [2020-12-22 09:42:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2020-12-22 09:42:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3653 transitions. [2020-12-22 09:42:25,258 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3653 transitions. Word has length 48 [2020-12-22 09:42:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:25,258 INFO L481 AbstractCegarLoop]: Abstraction has 2330 states and 3653 transitions. [2020-12-22 09:42:25,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:42:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3653 transitions. [2020-12-22 09:42:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:42:25,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:25,261 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] [2020-12-22 09:42:25,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:42:25,261 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:42:25,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:25,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078661070] [2020-12-22 09:42:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:25,374 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 09:42:25,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078661070] [2020-12-22 09:42:25,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:25,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623852391] [2020-12-22 09:42:25,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:25,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:25,377 INFO L87 Difference]: Start difference. First operand 2330 states and 3653 transitions. Second operand 6 states. [2020-12-22 09:42:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:25,605 INFO L93 Difference]: Finished difference Result 2690 states and 4221 transitions. [2020-12-22 09:42:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:42:25,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:42:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:25,622 INFO L225 Difference]: With dead ends: 2690 [2020-12-22 09:42:25,623 INFO L226 Difference]: Without dead ends: 2645 [2020-12-22 09:42:25,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:42:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2020-12-22 09:42:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2373. [2020-12-22 09:42:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 09:42:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3721 transitions. [2020-12-22 09:42:25,696 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3721 transitions. Word has length 52 [2020-12-22 09:42:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:25,699 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 3721 transitions. [2020-12-22 09:42:25,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3721 transitions. [2020-12-22 09:42:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:25,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:25,704 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] [2020-12-22 09:42:25,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:42:25,705 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:42:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:25,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397997157] [2020-12-22 09:42:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:25,791 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 09:42:25,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397997157] [2020-12-22 09:42:25,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:25,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:25,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492813596] [2020-12-22 09:42:25,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:25,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:25,795 INFO L87 Difference]: Start difference. First operand 2373 states and 3721 transitions. Second operand 3 states. [2020-12-22 09:42:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:25,865 INFO L93 Difference]: Finished difference Result 2538 states and 3980 transitions. [2020-12-22 09:42:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:25,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:25,880 INFO L225 Difference]: With dead ends: 2538 [2020-12-22 09:42:25,880 INFO L226 Difference]: Without dead ends: 2450 [2020-12-22 09:42:25,882 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 09:42:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2020-12-22 09:42:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2446. [2020-12-22 09:42:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-12-22 09:42:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3833 transitions. [2020-12-22 09:42:25,947 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3833 transitions. Word has length 54 [2020-12-22 09:42:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:25,948 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3833 transitions. [2020-12-22 09:42:25,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3833 transitions. [2020-12-22 09:42:25,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:25,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:25,951 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] [2020-12-22 09:42:25,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:42:25,952 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:25,952 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:42:25,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:25,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758432923] [2020-12-22 09:42:25,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,159 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 09:42:26,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758432923] [2020-12-22 09:42:26,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:26,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:26,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376536591] [2020-12-22 09:42:26,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:26,164 INFO L87 Difference]: Start difference. First operand 2446 states and 3833 transitions. Second operand 6 states. [2020-12-22 09:42:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:26,350 INFO L93 Difference]: Finished difference Result 2609 states and 4085 transitions. [2020-12-22 09:42:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:26,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:42:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:26,367 INFO L225 Difference]: With dead ends: 2609 [2020-12-22 09:42:26,367 INFO L226 Difference]: Without dead ends: 2448 [2020-12-22 09:42:26,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2020-12-22 09:42:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2446. [2020-12-22 09:42:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-12-22 09:42:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3831 transitions. [2020-12-22 09:42:26,450 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3831 transitions. Word has length 54 [2020-12-22 09:42:26,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:26,451 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3831 transitions. [2020-12-22 09:42:26,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3831 transitions. [2020-12-22 09:42:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:26,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:26,453 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] [2020-12-22 09:42:26,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:42:26,454 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:26,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:42:26,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:26,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020527135] [2020-12-22 09:42:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,587 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 09:42:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020527135] [2020-12-22 09:42:26,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:26,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171055681] [2020-12-22 09:42:26,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:26,590 INFO L87 Difference]: Start difference. First operand 2446 states and 3831 transitions. Second operand 3 states. [2020-12-22 09:42:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:26,659 INFO L93 Difference]: Finished difference Result 2744 states and 4289 transitions. [2020-12-22 09:42:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:26,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:26,680 INFO L225 Difference]: With dead ends: 2744 [2020-12-22 09:42:26,680 INFO L226 Difference]: Without dead ends: 2583 [2020-12-22 09:42:26,686 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 09:42:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2020-12-22 09:42:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2581. [2020-12-22 09:42:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2020-12-22 09:42:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4035 transitions. [2020-12-22 09:42:26,777 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4035 transitions. Word has length 54 [2020-12-22 09:42:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:26,777 INFO L481 AbstractCegarLoop]: Abstraction has 2581 states and 4035 transitions. [2020-12-22 09:42:26,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4035 transitions. [2020-12-22 09:42:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:26,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:26,779 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] [2020-12-22 09:42:26,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:42:26,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:26,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:42:26,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:26,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420348473] [2020-12-22 09:42:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:26,870 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 09:42:26,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420348473] [2020-12-22 09:42:26,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:26,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984110044] [2020-12-22 09:42:26,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:26,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:26,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:26,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:26,874 INFO L87 Difference]: Start difference. First operand 2581 states and 4035 transitions. Second operand 3 states. [2020-12-22 09:42:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:26,948 INFO L93 Difference]: Finished difference Result 3125 states and 4861 transitions. [2020-12-22 09:42:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:26,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:26,967 INFO L225 Difference]: With dead ends: 3125 [2020-12-22 09:42:26,967 INFO L226 Difference]: Without dead ends: 2829 [2020-12-22 09:42:26,970 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 09:42:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2020-12-22 09:42:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2827. [2020-12-22 09:42:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-12-22 09:42:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 4399 transitions. [2020-12-22 09:42:27,077 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 4399 transitions. Word has length 54 [2020-12-22 09:42:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:27,079 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 4399 transitions. [2020-12-22 09:42:27,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 4399 transitions. [2020-12-22 09:42:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:42:27,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:27,080 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] [2020-12-22 09:42:27,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:42:27,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:42:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:27,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859578826] [2020-12-22 09:42:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:27,152 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 09:42:27,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859578826] [2020-12-22 09:42:27,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:27,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57600287] [2020-12-22 09:42:27,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:27,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:27,159 INFO L87 Difference]: Start difference. First operand 2827 states and 4399 transitions. Second operand 3 states. [2020-12-22 09:42:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:27,273 INFO L93 Difference]: Finished difference Result 3815 states and 5873 transitions. [2020-12-22 09:42:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:27,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:42:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:27,291 INFO L225 Difference]: With dead ends: 3815 [2020-12-22 09:42:27,291 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:42:27,294 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 09:42:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:42:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3271. [2020-12-22 09:42:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3271 states. [2020-12-22 09:42:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3271 states to 3271 states and 5039 transitions. [2020-12-22 09:42:27,471 INFO L78 Accepts]: Start accepts. Automaton has 3271 states and 5039 transitions. Word has length 54 [2020-12-22 09:42:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:27,471 INFO L481 AbstractCegarLoop]: Abstraction has 3271 states and 5039 transitions. [2020-12-22 09:42:27,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3271 states and 5039 transitions. [2020-12-22 09:42:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:42:27,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:27,472 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] [2020-12-22 09:42:27,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:42:27,473 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:42:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:27,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459063930] [2020-12-22 09:42:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:27,577 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 09:42:27,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459063930] [2020-12-22 09:42:27,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:27,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551252011] [2020-12-22 09:42:27,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:42:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:27,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:42:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:42:27,584 INFO L87 Difference]: Start difference. First operand 3271 states and 5039 transitions. Second operand 5 states. [2020-12-22 09:42:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:27,803 INFO L93 Difference]: Finished difference Result 4025 states and 6124 transitions. [2020-12-22 09:42:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:42:27,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:42:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:27,854 INFO L225 Difference]: With dead ends: 4025 [2020-12-22 09:42:27,855 INFO L226 Difference]: Without dead ends: 4023 [2020-12-22 09:42:27,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:42:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2020-12-22 09:42:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3319. [2020-12-22 09:42:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3319 states. [2020-12-22 09:42:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 5079 transitions. [2020-12-22 09:42:28,019 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 5079 transitions. Word has length 55 [2020-12-22 09:42:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:28,020 INFO L481 AbstractCegarLoop]: Abstraction has 3319 states and 5079 transitions. [2020-12-22 09:42:28,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:42:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 5079 transitions. [2020-12-22 09:42:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:42:28,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:28,021 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] [2020-12-22 09:42:28,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:42:28,021 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:42:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:28,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536703307] [2020-12-22 09:42:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:28,094 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 09:42:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536703307] [2020-12-22 09:42:28,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:28,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091512224] [2020-12-22 09:42:28,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:28,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:28,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:28,099 INFO L87 Difference]: Start difference. First operand 3319 states and 5079 transitions. Second operand 3 states. [2020-12-22 09:42:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:28,260 INFO L93 Difference]: Finished difference Result 4382 states and 6637 transitions. [2020-12-22 09:42:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:28,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:42:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:28,271 INFO L225 Difference]: With dead ends: 4382 [2020-12-22 09:42:28,272 INFO L226 Difference]: Without dead ends: 3787 [2020-12-22 09:42:28,274 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 09:42:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2020-12-22 09:42:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2020-12-22 09:42:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:42:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:42:28,470 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 56 [2020-12-22 09:42:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:28,471 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:42:28,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:42:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:28,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:28,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:42:28,478 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:42:28,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:28,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266039728] [2020-12-22 09:42:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:42:28,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266039728] [2020-12-22 09:42:28,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:28,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:28,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205108334] [2020-12-22 09:42:28,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:28,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:28,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:28,595 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:42:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:29,273 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:42:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:29,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:29,297 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:42:29,298 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:42:29,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:42:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:42:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:42:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:42:29,732 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:42:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:29,732 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:42:29,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:42:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:29,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:29,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:29,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:42:29,736 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:29,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:42:29,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:29,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625906506] [2020-12-22 09:42:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:42:29,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625906506] [2020-12-22 09:42:29,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:29,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:29,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220536398] [2020-12-22 09:42:29,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:29,878 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:42:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:30,648 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:42:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:30,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:30,673 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:42:30,673 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:42:30,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:42:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:42:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:42:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:42:31,335 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:42:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:31,336 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:42:31,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:42:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:42:31,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:31,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:31,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:42:31,340 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:42:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:31,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425463589] [2020-12-22 09:42:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:42:31,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425463589] [2020-12-22 09:42:31,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:31,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:31,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605842309] [2020-12-22 09:42:31,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:31,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:31,463 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:42:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:32,427 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:42:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:32,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:42:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:32,456 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:42:32,456 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:42:32,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:42:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:42:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:42:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:42:33,113 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:42:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:33,114 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:42:33,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:42:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:42:33,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:33,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:33,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:42:33,118 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:42:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:33,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188461778] [2020-12-22 09:42:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188461778] [2020-12-22 09:42:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:33,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982117763] [2020-12-22 09:42:33,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:33,188 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:42:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:33,694 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:42:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:33,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:42:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:33,712 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:42:33,712 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:42:33,728 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 09:42:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:42:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:42:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:42:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:42:34,210 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:42:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:34,210 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:42:34,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:42:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:42:34,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:34,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:34,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:42:34,213 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:34,214 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:42:34,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:34,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35942186] [2020-12-22 09:42:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:42:34,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35942186] [2020-12-22 09:42:34,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:34,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:42:34,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521823699] [2020-12-22 09:42:34,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:34,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:34,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:34,338 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:42:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:35,054 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:42:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:35,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:42:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:35,083 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:42:35,083 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:42:35,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:42:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:42:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:42:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:42:35,753 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:42:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:35,753 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:42:35,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:42:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:35,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:35,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:35,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:42:35,757 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:42:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:35,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302952023] [2020-12-22 09:42:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:35,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302952023] [2020-12-22 09:42:35,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:35,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396596967] [2020-12-22 09:42:35,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:35,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:35,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:35,850 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:42:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:36,127 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:42:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:36,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:36,142 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:42:36,143 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:42:36,153 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 09:42:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:42:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:42:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:42:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:42:36,458 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:42:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:36,459 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:42:36,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:42:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:36,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:36,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:36,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:42:36,461 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:42:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:36,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625439123] [2020-12-22 09:42:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:36,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625439123] [2020-12-22 09:42:36,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:36,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:36,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039405046] [2020-12-22 09:42:36,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:36,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:36,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:36,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:36,525 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:42:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:36,681 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:42:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:36,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:36,690 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:42:36,691 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:42:36,697 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 09:42:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:42:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:42:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:42:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:42:36,914 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:42:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:36,915 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:42:36,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:42:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:36,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:36,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:36,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:42:36,917 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:36,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:42:36,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:36,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553832576] [2020-12-22 09:42:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:36,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553832576] [2020-12-22 09:42:36,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:36,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:36,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219504592] [2020-12-22 09:42:36,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:36,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:36,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:36,976 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:42:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:37,068 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:42:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:37,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:37,076 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:42:37,076 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:42:37,079 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 09:42:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:42:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:42:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:42:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:42:37,179 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:42:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:37,179 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:42:37,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:42:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:37,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:37,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:37,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:37,182 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:42:37,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:37,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697755986] [2020-12-22 09:42:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:37,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697755986] [2020-12-22 09:42:37,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390983820] [2020-12-22 09:42:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:42:37,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:42:37,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:37,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:42:37,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709628396] [2020-12-22 09:42:37,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:42:37,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:42:37,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:42:37,963 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:42:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:39,724 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:42:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:42:39,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:42:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:39,742 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:42:39,742 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:42:39,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:42:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:42:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:42:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:42:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:42:40,281 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:42:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:40,281 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:42:40,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:42:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:42:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:40,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:40,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:40,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:40,498 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:42:40,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:40,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407812764] [2020-12-22 09:42:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407812764] [2020-12-22 09:42:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351012321] [2020-12-22 09:42:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:40,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:40,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:41,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:41,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:41,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:42:41,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77650472] [2020-12-22 09:42:41,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:42:41,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:42:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:42:41,592 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:42:41,722 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:42:41,956 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:43,794 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:42:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:45,096 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:42:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:42:45,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:42:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:45,127 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:42:45,128 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:42:45,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:42:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:42:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:42:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:42:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:42:46,140 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:42:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:46,141 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:42:46,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:42:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:42:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:46,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:46,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:46,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:46,358 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:42:46,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:46,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387063956] [2020-12-22 09:42:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:46,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387063956] [2020-12-22 09:42:46,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780738353] [2020-12-22 09:42:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:42:46,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:47,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:47,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:47,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:42:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327001078] [2020-12-22 09:42:47,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:42:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:42:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:42:47,414 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:42:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:51,541 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:42:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:42:51,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:42:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:51,613 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:42:51,614 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:42:51,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:42:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:42:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:42:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:42:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:42:53,654 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:42:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:53,655 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:42:53,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:42:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:42:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:53,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:53,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:42:53,874 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:53,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:42:53,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:53,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403623021] [2020-12-22 09:42:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:42:53,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403623021] [2020-12-22 09:42:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:53,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:53,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505569502] [2020-12-22 09:42:53,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:53,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:53,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:53,961 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:42:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:54,863 INFO L93 Difference]: Finished difference Result 28225 states and 36926 transitions. [2020-12-22 09:42:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:54,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:54,888 INFO L225 Difference]: With dead ends: 28225 [2020-12-22 09:42:54,889 INFO L226 Difference]: Without dead ends: 10938 [2020-12-22 09:42:54,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2020-12-22 09:42:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 10938. [2020-12-22 09:42:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10938 states. [2020-12-22 09:42:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 14590 transitions. [2020-12-22 09:42:56,209 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 14590 transitions. Word has length 82 [2020-12-22 09:42:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:56,209 INFO L481 AbstractCegarLoop]: Abstraction has 10938 states and 14590 transitions. [2020-12-22 09:42:56,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 14590 transitions. [2020-12-22 09:42:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:56,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:56,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:42:56,212 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:42:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:56,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409969613] [2020-12-22 09:42:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:42:56,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409969613] [2020-12-22 09:42:56,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:56,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472224315] [2020-12-22 09:42:56,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:56,343 INFO L87 Difference]: Start difference. First operand 10938 states and 14590 transitions. Second operand 6 states. [2020-12-22 09:42:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:57,096 INFO L93 Difference]: Finished difference Result 17371 states and 22838 transitions. [2020-12-22 09:42:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:57,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:57,107 INFO L225 Difference]: With dead ends: 17371 [2020-12-22 09:42:57,107 INFO L226 Difference]: Without dead ends: 8821 [2020-12-22 09:42:57,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:42:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2020-12-22 09:42:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2020-12-22 09:42:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 09:42:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11812 transitions. [2020-12-22 09:42:58,004 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11812 transitions. Word has length 82 [2020-12-22 09:42:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:58,005 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 11812 transitions. [2020-12-22 09:42:58,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11812 transitions. [2020-12-22 09:42:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:42:58,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:58,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:42:58,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:42:58,010 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:42:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:58,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965439367] [2020-12-22 09:42:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:42:58,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965439367] [2020-12-22 09:42:58,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:58,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:42:58,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495331311] [2020-12-22 09:42:58,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:42:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:42:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:42:58,094 INFO L87 Difference]: Start difference. First operand 8821 states and 11812 transitions. Second operand 6 states. [2020-12-22 09:42:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:59,988 INFO L93 Difference]: Finished difference Result 19291 states and 25248 transitions. [2020-12-22 09:42:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:42:59,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:42:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:00,005 INFO L225 Difference]: With dead ends: 19291 [2020-12-22 09:43:00,005 INFO L226 Difference]: Without dead ends: 12794 [2020-12-22 09:43:00,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2020-12-22 09:43:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 11824. [2020-12-22 09:43:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11824 states. [2020-12-22 09:43:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 15615 transitions. [2020-12-22 09:43:01,037 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 15615 transitions. Word has length 82 [2020-12-22 09:43:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:01,037 INFO L481 AbstractCegarLoop]: Abstraction has 11824 states and 15615 transitions. [2020-12-22 09:43:01,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 15615 transitions. [2020-12-22 09:43:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:43:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:01,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:01,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:43:01,039 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:43:01,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:01,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993436868] [2020-12-22 09:43:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:01,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993436868] [2020-12-22 09:43:01,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049363373] [2020-12-22 09:43:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:43:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:01,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:43:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:01,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:01,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:43:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93930222] [2020-12-22 09:43:01,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:43:01,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:43:01,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:43:01,939 INFO L87 Difference]: Start difference. First operand 11824 states and 15615 transitions. Second operand 17 states. [2020-12-22 09:43:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:07,619 INFO L93 Difference]: Finished difference Result 49237 states and 62351 transitions. [2020-12-22 09:43:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:43:07,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:43:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:07,670 INFO L225 Difference]: With dead ends: 49237 [2020-12-22 09:43:07,671 INFO L226 Difference]: Without dead ends: 41211 [2020-12-22 09:43:07,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:43:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41211 states. [2020-12-22 09:43:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41211 to 26445. [2020-12-22 09:43:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26445 states. [2020-12-22 09:43:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26445 states to 26445 states and 34001 transitions. [2020-12-22 09:43:10,876 INFO L78 Accepts]: Start accepts. Automaton has 26445 states and 34001 transitions. Word has length 83 [2020-12-22 09:43:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:10,877 INFO L481 AbstractCegarLoop]: Abstraction has 26445 states and 34001 transitions. [2020-12-22 09:43:10,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:43:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 26445 states and 34001 transitions. [2020-12-22 09:43:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:43:10,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:10,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:11,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:11,085 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:43:11,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:11,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277920996] [2020-12-22 09:43:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:43:11,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277920996] [2020-12-22 09:43:11,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:11,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089680862] [2020-12-22 09:43:11,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:11,174 INFO L87 Difference]: Start difference. First operand 26445 states and 34001 transitions. Second operand 6 states. [2020-12-22 09:43:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:13,497 INFO L93 Difference]: Finished difference Result 44728 states and 56973 transitions. [2020-12-22 09:43:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:13,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:43:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:13,522 INFO L225 Difference]: With dead ends: 44728 [2020-12-22 09:43:13,523 INFO L226 Difference]: Without dead ends: 20771 [2020-12-22 09:43:13,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20771 states. [2020-12-22 09:43:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20771 to 20771. [2020-12-22 09:43:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20771 states. [2020-12-22 09:43:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20771 states to 20771 states and 26465 transitions. [2020-12-22 09:43:16,085 INFO L78 Accepts]: Start accepts. Automaton has 20771 states and 26465 transitions. Word has length 83 [2020-12-22 09:43:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:16,085 INFO L481 AbstractCegarLoop]: Abstraction has 20771 states and 26465 transitions. [2020-12-22 09:43:16,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 20771 states and 26465 transitions. [2020-12-22 09:43:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:43:16,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:16,087 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:16,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:43:16,088 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:43:16,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:16,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248138502] [2020-12-22 09:43:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248138502] [2020-12-22 09:43:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266307394] [2020-12-22 09:43:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:18,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:43:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:18,648 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:43:18,992 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:43:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:19,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:19,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:43:19,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296423788] [2020-12-22 09:43:19,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:43:19,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:43:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:43:19,956 INFO L87 Difference]: Start difference. First operand 20771 states and 26465 transitions. Second operand 39 states. [2020-12-22 09:43:20,441 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-12-22 09:43:21,589 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-12-22 09:43:21,927 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 09:43:22,174 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 09:43:22,439 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-22 09:43:22,776 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-22 09:43:23,098 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-22 09:43:23,517 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-12-22 09:43:24,145 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-12-22 09:43:24,891 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2020-12-22 09:43:25,577 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-12-22 09:43:26,001 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:43:26,429 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:43:26,801 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:43:27,273 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:43:27,639 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 09:43:28,026 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:43:28,554 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:43:28,817 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:29,154 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:43:29,680 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:43:30,154 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:43:30,530 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:43:30,969 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:43:31,308 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:43:31,642 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:43:32,162 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:43:32,491 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:43:32,738 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:43:33,253 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:43:33,683 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:43:34,063 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:43:34,472 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-22 09:43:34,953 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:43:35,217 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:43:35,839 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:43:36,246 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:43:36,499 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:36,771 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:43:37,402 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:43:37,727 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:38,068 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:43:38,549 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:43:39,008 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:43:39,377 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:43:39,920 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:43:40,638 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:41,900 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 09:43:42,497 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-22 09:43:43,418 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-22 09:43:43,984 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-12-22 09:43:44,371 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:43:44,701 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:43:45,238 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:43:45,557 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:43:46,158 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:43:46,705 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:43:47,047 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:43:47,980 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:43:48,590 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:43:49,093 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:43:49,375 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:43:49,759 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:50,265 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:43:51,321 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-12-22 09:43:51,694 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:52,234 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:43:52,664 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:43:53,702 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:43:54,453 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:43:56,419 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:43:57,087 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:43:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:58,159 INFO L93 Difference]: Finished difference Result 34675 states and 43895 transitions. [2020-12-22 09:43:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 09:43:58,160 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-12-22 09:43:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:58,197 INFO L225 Difference]: With dead ends: 34675 [2020-12-22 09:43:58,197 INFO L226 Difference]: Without dead ends: 27079 [2020-12-22 09:43:58,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=2385, Invalid=12867, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 09:43:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-12-22 09:44:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 18820. [2020-12-22 09:44:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18820 states. [2020-12-22 09:44:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18820 states to 18820 states and 24108 transitions. [2020-12-22 09:44:00,645 INFO L78 Accepts]: Start accepts. Automaton has 18820 states and 24108 transitions. Word has length 84 [2020-12-22 09:44:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:00,645 INFO L481 AbstractCegarLoop]: Abstraction has 18820 states and 24108 transitions. [2020-12-22 09:44:00,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:44:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18820 states and 24108 transitions. [2020-12-22 09:44:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:44:00,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:00,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:00,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:44:00,861 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:44:00,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:00,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252851556] [2020-12-22 09:44:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:01,452 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:01,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252851556] [2020-12-22 09:44:01,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311660799] [2020-12-22 09:44:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:44:01,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:02,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:02,911 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-12-22 09:44:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:03,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:03,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:03,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258098355] [2020-12-22 09:44:03,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:03,496 INFO L87 Difference]: Start difference. First operand 18820 states and 24108 transitions. Second operand 24 states. [2020-12-22 09:44:03,723 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:04,078 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-12-22 09:44:04,261 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-22 09:44:04,472 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:44:04,661 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:44:04,935 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:44:05,221 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 09:44:05,718 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:44:06,054 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:44:06,435 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:44:06,891 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:44:07,351 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:44:07,871 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:44:08,227 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:44:08,701 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 09:44:08,954 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 09:44:09,280 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:44:09,534 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 09:44:09,796 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:44:10,063 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:44:10,294 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:44:10,495 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 09:44:10,992 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:44:12,923 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:44:13,288 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:44:13,510 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:13,744 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:14,027 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:44:14,329 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:44:14,558 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:44:14,877 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 09:44:15,793 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:44:16,426 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:44:17,748 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-12-22 09:44:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:19,129 INFO L93 Difference]: Finished difference Result 31048 states and 39838 transitions. [2020-12-22 09:44:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 09:44:19,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2020-12-22 09:44:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:19,161 INFO L225 Difference]: With dead ends: 31048 [2020-12-22 09:44:19,161 INFO L226 Difference]: Without dead ends: 20179 [2020-12-22 09:44:19,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=895, Invalid=4507, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 09:44:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20179 states. [2020-12-22 09:44:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20179 to 12419. [2020-12-22 09:44:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12419 states. [2020-12-22 09:44:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12419 states to 12419 states and 16417 transitions. [2020-12-22 09:44:20,796 INFO L78 Accepts]: Start accepts. Automaton has 12419 states and 16417 transitions. Word has length 84 [2020-12-22 09:44:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:20,797 INFO L481 AbstractCegarLoop]: Abstraction has 12419 states and 16417 transitions. [2020-12-22 09:44:20,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:44:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12419 states and 16417 transitions. [2020-12-22 09:44:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:44:20,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:20,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:21,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:44:21,005 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash -68902190, now seen corresponding path program 1 times [2020-12-22 09:44:21,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:21,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693961016] [2020-12-22 09:44:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:21,902 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-12-22 09:44:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:22,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693961016] [2020-12-22 09:44:22,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377894865] [2020-12-22 09:44:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:44:22,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:23,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:23,906 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-12-22 09:44:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:24,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:24,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-12-22 09:44:24,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961592079] [2020-12-22 09:44:24,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:44:24,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:44:24,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:44:24,845 INFO L87 Difference]: Start difference. First operand 12419 states and 16417 transitions. Second operand 30 states. [2020-12-22 09:44:25,249 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-12-22 09:44:25,775 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-12-22 09:44:26,014 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-12-22 09:44:26,326 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-12-22 09:44:26,838 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-12-22 09:44:27,500 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-22 09:44:28,608 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-12-22 09:44:29,646 WARN L197 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-12-22 09:44:30,561 WARN L197 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:44:30,969 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 09:44:31,343 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:44:32,019 WARN L197 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-12-22 09:44:32,300 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:44:32,965 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-12-22 09:44:33,440 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-22 09:44:34,205 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:44:34,566 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:44:35,369 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-12-22 09:44:36,860 WARN L197 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-12-22 09:44:37,516 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-12-22 09:44:37,870 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-12-22 09:44:38,565 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:44:39,966 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-12-22 09:44:41,011 WARN L197 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-12-22 09:44:41,605 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:44:42,423 WARN L197 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-22 09:44:43,160 WARN L197 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 09:44:44,182 WARN L197 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2020-12-22 09:44:45,328 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 09:44:46,635 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-22 09:44:47,774 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-12-22 09:44:48,393 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 09:44:49,253 WARN L197 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-22 09:44:49,880 WARN L197 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 09:44:50,322 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:44:51,202 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 09:44:51,884 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:44:52,263 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 09:44:52,716 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-22 09:44:52,986 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2020-12-22 09:44:54,469 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-12-22 09:44:55,402 WARN L197 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-12-22 09:44:56,053 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-12-22 09:44:57,324 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-12-22 09:44:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:58,445 INFO L93 Difference]: Finished difference Result 21223 states and 27764 transitions. [2020-12-22 09:44:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:44:58,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-12-22 09:44:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:58,470 INFO L225 Difference]: With dead ends: 21223 [2020-12-22 09:44:58,470 INFO L226 Difference]: Without dead ends: 16804 [2020-12-22 09:44:58,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=1136, Invalid=5184, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:44:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16804 states. [2020-12-22 09:44:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16804 to 10858. [2020-12-22 09:44:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10858 states. [2020-12-22 09:44:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 14476 transitions. [2020-12-22 09:44:59,896 INFO L78 Accepts]: Start accepts. Automaton has 10858 states and 14476 transitions. Word has length 86 [2020-12-22 09:44:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:59,896 INFO L481 AbstractCegarLoop]: Abstraction has 10858 states and 14476 transitions. [2020-12-22 09:44:59,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:44:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 10858 states and 14476 transitions. [2020-12-22 09:44:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:44:59,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:59,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:00,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:00,113 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1054813317, now seen corresponding path program 1 times [2020-12-22 09:45:00,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:00,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631127270] [2020-12-22 09:45:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:00,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631127270] [2020-12-22 09:45:00,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:00,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:00,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156761897] [2020-12-22 09:45:00,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:45:00,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:45:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:45:00,270 INFO L87 Difference]: Start difference. First operand 10858 states and 14476 transitions. Second operand 4 states. [2020-12-22 09:45:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:18,135 INFO L93 Difference]: Finished difference Result 14654 states and 20840 transitions. [2020-12-22 09:45:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:45:18,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 09:45:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:18,151 INFO L225 Difference]: With dead ends: 14654 [2020-12-22 09:45:18,152 INFO L226 Difference]: Without dead ends: 12362 [2020-12-22 09:45:18,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:45:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12362 states. [2020-12-22 09:45:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12362 to 12360. [2020-12-22 09:45:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12360 states. [2020-12-22 09:45:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12360 states to 12360 states and 16064 transitions. [2020-12-22 09:45:19,592 INFO L78 Accepts]: Start accepts. Automaton has 12360 states and 16064 transitions. Word has length 119 [2020-12-22 09:45:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,592 INFO L481 AbstractCegarLoop]: Abstraction has 12360 states and 16064 transitions. [2020-12-22 09:45:19,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:45:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 12360 states and 16064 transitions. [2020-12-22 09:45:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:45:19,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:19,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:45:19,603 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:45:19,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384942441] [2020-12-22 09:45:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:20,059 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:45:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:20,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384942441] [2020-12-22 09:45:20,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221482628] [2020-12-22 09:45:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:20,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:45:20,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:45:21,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:21,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:45:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720351709] [2020-12-22 09:45:21,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:45:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:45:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:45:21,049 INFO L87 Difference]: Start difference. First operand 12360 states and 16064 transitions. Second operand 15 states. [2020-12-22 09:45:21,229 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:45:21,610 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-22 09:45:21,910 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:45:22,228 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:45:22,430 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:45:22,868 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:23,227 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:45:23,671 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:45:23,908 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:24,178 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:24,530 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:24,768 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:45:25,031 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:45:25,962 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:45:26,689 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:45:26,967 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:27,242 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:45:27,711 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:45:27,982 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:45:28,195 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:45:28,969 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:45:29,721 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:45:29,959 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:45:30,183 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:45:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:30,641 INFO L93 Difference]: Finished difference Result 24979 states and 31998 transitions. [2020-12-22 09:45:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:45:30,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:45:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:30,664 INFO L225 Difference]: With dead ends: 24979 [2020-12-22 09:45:30,664 INFO L226 Difference]: Without dead ends: 17001 [2020-12-22 09:45:30,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:45:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17001 states. [2020-12-22 09:45:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17001 to 16889. [2020-12-22 09:45:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16889 states. [2020-12-22 09:45:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16889 states to 16889 states and 21146 transitions. [2020-12-22 09:45:32,935 INFO L78 Accepts]: Start accepts. Automaton has 16889 states and 21146 transitions. Word has length 135 [2020-12-22 09:45:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:32,935 INFO L481 AbstractCegarLoop]: Abstraction has 16889 states and 21146 transitions. [2020-12-22 09:45:32,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:45:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16889 states and 21146 transitions. [2020-12-22 09:45:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:45:32,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:32,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:33,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 09:45:33,154 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:45:33,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515451671] [2020-12-22 09:45:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:33,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515451671] [2020-12-22 09:45:33,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611641492] [2020-12-22 09:45:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:45:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:34,323 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:45:35,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:45:35,409 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2020-12-22 09:45:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:35,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:35,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:45:35,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990657503] [2020-12-22 09:45:35,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:45:35,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:45:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:45:35,978 INFO L87 Difference]: Start difference. First operand 16889 states and 21146 transitions. Second operand 22 states. [2020-12-22 09:45:36,392 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:45:36,868 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:45:37,294 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:45:38,067 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:45:38,551 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:45:38,887 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:45:39,722 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:45:40,497 WARN L197 SmtUtils]: Spent 637.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 09:45:41,331 WARN L197 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:45:42,168 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:45:43,793 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:45:45,909 WARN L197 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:45:47,709 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 106 [2020-12-22 09:45:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:50,166 INFO L93 Difference]: Finished difference Result 24789 states and 30762 transitions. [2020-12-22 09:45:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 09:45:50,169 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-12-22 09:45:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:50,187 INFO L225 Difference]: With dead ends: 24789 [2020-12-22 09:45:50,187 INFO L226 Difference]: Without dead ends: 18873 [2020-12-22 09:45:50,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:45:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2020-12-22 09:45:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 16889. [2020-12-22 09:45:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16889 states. [2020-12-22 09:45:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16889 states to 16889 states and 21044 transitions. [2020-12-22 09:45:52,997 INFO L78 Accepts]: Start accepts. Automaton has 16889 states and 21044 transitions. Word has length 136 [2020-12-22 09:45:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:52,998 INFO L481 AbstractCegarLoop]: Abstraction has 16889 states and 21044 transitions. [2020-12-22 09:45:52,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:45:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 16889 states and 21044 transitions. [2020-12-22 09:45:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:45:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:53,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:45:53,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:53,206 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1426411414, now seen corresponding path program 1 times [2020-12-22 09:45:53,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:53,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502432952] [2020-12-22 09:45:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat