/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/product-lines/email_spec11_product15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:19:53,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:19:53,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:19:53,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:19:53,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:19:53,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:19:53,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:19:53,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:19:53,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:19:53,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:19:53,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:19:53,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:19:53,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:19:53,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:19:53,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:19:53,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:19:53,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:19:53,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:19:54,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:19:54,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:19:54,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:19:54,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:19:54,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:19:54,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:19:54,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:19:54,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 06:19:54,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 06:19:54,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 06:19:54,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 06:19:54,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 06:19:54,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 06:19:54,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 06:19:54,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 06:19:54,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:19:54,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:19:54,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:19:54,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:19:54,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:19:54,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:19:54,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:19:54,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:19:54,063 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:19:54,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:19:54,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:19:54,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:19:54,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:19:54,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:19:54,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:19:54,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:19:54,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:19:54,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:19:54,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:19:54,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:19:54,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:19:54,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:19:54,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:19:54,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:19:54,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:19:54,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:19:54,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:19:54,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:19:54,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:19:54,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:19:54,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:19:54,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:19:54,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:19:54,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:19:54,473 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:19:54,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2020-12-22 06:19:54,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdab7aff/9c2c6d254b2143d3adc899aeb9c64a52/FLAG721912c6c [2020-12-22 06:19:55,558 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:19:55,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2020-12-22 06:19:55,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdab7aff/9c2c6d254b2143d3adc899aeb9c64a52/FLAG721912c6c [2020-12-22 06:19:55,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcdab7aff/9c2c6d254b2143d3adc899aeb9c64a52 [2020-12-22 06:19:55,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:19:55,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:19:55,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:55,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:19:55,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:19:55,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:55" (1/1) ... [2020-12-22 06:19:55,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62445750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:55, skipping insertion in model container [2020-12-22 06:19:55,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:19:55" (1/1) ... [2020-12-22 06:19:55,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:19:55,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:19:56,445 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/product-lines/email_spec11_product15.cil.c[45305,45318] [2020-12-22 06:19:56,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:56,655 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:19:56,796 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/product-lines/email_spec11_product15.cil.c[45305,45318] [2020-12-22 06:19:56,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:19:56,915 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:19:56,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56 WrapperNode [2020-12-22 06:19:56,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:19:56,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:56,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:19:56,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:19:56,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:56,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:19:57,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:19:57,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:19:57,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:19:57,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (1/1) ... [2020-12-22 06:19:57,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:19:57,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:19:57,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:19:57,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:19:57,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (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 06:19:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2020-12-22 06:19:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:19:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:19:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:19:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:19:59,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:19:59,960 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2020-12-22 06:19:59,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:19:59 BoogieIcfgContainer [2020-12-22 06:19:59,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:19:59,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:19:59,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:19:59,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:19:59,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:19:55" (1/3) ... [2020-12-22 06:19:59,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463dab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:19:59, skipping insertion in model container [2020-12-22 06:19:59,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:19:56" (2/3) ... [2020-12-22 06:19:59,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463dab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:19:59, skipping insertion in model container [2020-12-22 06:19:59,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:19:59" (3/3) ... [2020-12-22 06:19:59,972 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product15.cil.c [2020-12-22 06:19:59,979 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:19:59,985 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 06:20:00,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 06:20:00,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:20:00,034 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:20:00,034 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:20:00,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:20:00,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:20:00,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:20:00,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:20:00,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:20:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states. [2020-12-22 06:20:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 06:20:00,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:00,075 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 06:20:00,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2103786118, now seen corresponding path program 1 times [2020-12-22 06:20:00,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:00,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014481236] [2020-12-22 06:20:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:00,528 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 06:20:00,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014481236] [2020-12-22 06:20:00,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:00,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:00,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808704888] [2020-12-22 06:20:00,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:00,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:00,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:00,552 INFO L87 Difference]: Start difference. First operand 407 states. Second operand 3 states. [2020-12-22 06:20:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:00,756 INFO L93 Difference]: Finished difference Result 1186 states and 2078 transitions. [2020-12-22 06:20:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:00,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 06:20:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:00,784 INFO L225 Difference]: With dead ends: 1186 [2020-12-22 06:20:00,785 INFO L226 Difference]: Without dead ends: 772 [2020-12-22 06:20:00,791 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 06:20:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-12-22 06:20:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 395. [2020-12-22 06:20:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 686 transitions. [2020-12-22 06:20:00,874 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 686 transitions. Word has length 52 [2020-12-22 06:20:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:00,875 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 686 transitions. [2020-12-22 06:20:00,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 686 transitions. [2020-12-22 06:20:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:20:00,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:00,880 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 06:20:00,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:20:00,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1232518093, now seen corresponding path program 1 times [2020-12-22 06:20:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:00,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161117586] [2020-12-22 06:20:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:01,024 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 06:20:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161117586] [2020-12-22 06:20:01,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:01,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:01,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174975681] [2020-12-22 06:20:01,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:01,030 INFO L87 Difference]: Start difference. First operand 395 states and 686 transitions. Second operand 5 states. [2020-12-22 06:20:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:01,310 INFO L93 Difference]: Finished difference Result 1134 states and 1974 transitions. [2020-12-22 06:20:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:20:01,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 06:20:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:01,317 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 06:20:01,317 INFO L226 Difference]: Without dead ends: 758 [2020-12-22 06:20:01,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 06:20:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2020-12-22 06:20:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 395. [2020-12-22 06:20:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 685 transitions. [2020-12-22 06:20:01,369 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 685 transitions. Word has length 54 [2020-12-22 06:20:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:01,369 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 685 transitions. [2020-12-22 06:20:01,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 685 transitions. [2020-12-22 06:20:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 06:20:01,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:01,376 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 06:20:01,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:20:01,377 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:01,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:01,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1691155290, now seen corresponding path program 1 times [2020-12-22 06:20:01,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:01,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42978298] [2020-12-22 06:20:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:01,548 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 06:20:01,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42978298] [2020-12-22 06:20:01,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:01,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119357208] [2020-12-22 06:20:01,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:01,555 INFO L87 Difference]: Start difference. First operand 395 states and 685 transitions. Second operand 3 states. [2020-12-22 06:20:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:01,607 INFO L93 Difference]: Finished difference Result 772 states and 1344 transitions. [2020-12-22 06:20:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:01,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 06:20:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:01,611 INFO L225 Difference]: With dead ends: 772 [2020-12-22 06:20:01,611 INFO L226 Difference]: Without dead ends: 400 [2020-12-22 06:20:01,612 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 06:20:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-12-22 06:20:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 395. [2020-12-22 06:20:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 684 transitions. [2020-12-22 06:20:01,632 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 684 transitions. Word has length 55 [2020-12-22 06:20:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:01,633 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 684 transitions. [2020-12-22 06:20:01,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 684 transitions. [2020-12-22 06:20:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 06:20:01,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:01,635 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 06:20:01,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:20:01,636 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1379163232, now seen corresponding path program 1 times [2020-12-22 06:20:01,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:01,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299072863] [2020-12-22 06:20:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:01,731 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 06:20:01,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299072863] [2020-12-22 06:20:01,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:01,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397942913] [2020-12-22 06:20:01,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:01,734 INFO L87 Difference]: Start difference. First operand 395 states and 684 transitions. Second operand 3 states. [2020-12-22 06:20:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:01,784 INFO L93 Difference]: Finished difference Result 782 states and 1357 transitions. [2020-12-22 06:20:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:01,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 06:20:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:01,788 INFO L225 Difference]: With dead ends: 782 [2020-12-22 06:20:01,788 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 06:20:01,789 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 06:20:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 06:20:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2020-12-22 06:20:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 682 transitions. [2020-12-22 06:20:01,808 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 682 transitions. Word has length 56 [2020-12-22 06:20:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:01,809 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 682 transitions. [2020-12-22 06:20:01,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 682 transitions. [2020-12-22 06:20:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 06:20:01,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:01,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:01,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:20:01,811 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 943175797, now seen corresponding path program 1 times [2020-12-22 06:20:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:01,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754457864] [2020-12-22 06:20:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:01,902 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 06:20:01,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754457864] [2020-12-22 06:20:01,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:01,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617970970] [2020-12-22 06:20:01,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:01,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:01,905 INFO L87 Difference]: Start difference. First operand 395 states and 682 transitions. Second operand 5 states. [2020-12-22 06:20:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,144 INFO L93 Difference]: Finished difference Result 1124 states and 1954 transitions. [2020-12-22 06:20:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:02,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-12-22 06:20:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,150 INFO L225 Difference]: With dead ends: 1124 [2020-12-22 06:20:02,150 INFO L226 Difference]: Without dead ends: 756 [2020-12-22 06:20:02,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:20:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-12-22 06:20:02,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 395. [2020-12-22 06:20:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 681 transitions. [2020-12-22 06:20:02,175 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 681 transitions. Word has length 57 [2020-12-22 06:20:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,176 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 681 transitions. [2020-12-22 06:20:02,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 681 transitions. [2020-12-22 06:20:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 06:20:02,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:02,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:20:02,178 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1067224872, now seen corresponding path program 1 times [2020-12-22 06:20:02,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708618331] [2020-12-22 06:20:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:02,261 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 06:20:02,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708618331] [2020-12-22 06:20:02,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:02,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:02,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568176311] [2020-12-22 06:20:02,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:02,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:02,264 INFO L87 Difference]: Start difference. First operand 395 states and 681 transitions. Second operand 5 states. [2020-12-22 06:20:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,514 INFO L93 Difference]: Finished difference Result 1129 states and 1959 transitions. [2020-12-22 06:20:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:02,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-12-22 06:20:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,520 INFO L225 Difference]: With dead ends: 1129 [2020-12-22 06:20:02,520 INFO L226 Difference]: Without dead ends: 761 [2020-12-22 06:20:02,521 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 06:20:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-12-22 06:20:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2020-12-22 06:20:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 06:20:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 680 transitions. [2020-12-22 06:20:02,551 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 680 transitions. Word has length 58 [2020-12-22 06:20:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,552 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 680 transitions. [2020-12-22 06:20:02,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 680 transitions. [2020-12-22 06:20:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 06:20:02,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:02,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 06:20:02,554 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash 608949232, now seen corresponding path program 1 times [2020-12-22 06:20:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479735007] [2020-12-22 06:20:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:02,618 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 06:20:02,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479735007] [2020-12-22 06:20:02,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:02,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:02,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874985425] [2020-12-22 06:20:02,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:02,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:02,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:02,621 INFO L87 Difference]: Start difference. First operand 395 states and 680 transitions. Second operand 3 states. [2020-12-22 06:20:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,660 INFO L93 Difference]: Finished difference Result 552 states and 936 transitions. [2020-12-22 06:20:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:02,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 06:20:02,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,664 INFO L225 Difference]: With dead ends: 552 [2020-12-22 06:20:02,664 INFO L226 Difference]: Without dead ends: 398 [2020-12-22 06:20:02,665 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 06:20:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-22 06:20:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2020-12-22 06:20:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-22 06:20:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 682 transitions. [2020-12-22 06:20:02,695 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 682 transitions. Word has length 59 [2020-12-22 06:20:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,695 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 682 transitions. [2020-12-22 06:20:02,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 682 transitions. [2020-12-22 06:20:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 06:20:02,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,697 INFO L422 BasicCegarLoop]: trace histogram [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 06:20:02,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 06:20:02,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1538818014, now seen corresponding path program 1 times [2020-12-22 06:20:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593634510] [2020-12-22 06:20:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593634510] [2020-12-22 06:20:02,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:02,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:02,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626995968] [2020-12-22 06:20:02,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:02,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:02,768 INFO L87 Difference]: Start difference. First operand 397 states and 682 transitions. Second operand 3 states. [2020-12-22 06:20:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:02,828 INFO L93 Difference]: Finished difference Result 1077 states and 1870 transitions. [2020-12-22 06:20:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:02,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 06:20:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:02,834 INFO L225 Difference]: With dead ends: 1077 [2020-12-22 06:20:02,834 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 06:20:02,836 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 06:20:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 06:20:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 557. [2020-12-22 06:20:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-12-22 06:20:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 975 transitions. [2020-12-22 06:20:02,879 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 975 transitions. Word has length 67 [2020-12-22 06:20:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:02,879 INFO L481 AbstractCegarLoop]: Abstraction has 557 states and 975 transitions. [2020-12-22 06:20:02,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 975 transitions. [2020-12-22 06:20:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:20:02,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:02,881 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:20:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 06:20:02,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash -84044739, now seen corresponding path program 1 times [2020-12-22 06:20:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737670700] [2020-12-22 06:20:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:03,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737670700] [2020-12-22 06:20:03,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:03,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695171768] [2020-12-22 06:20:03,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:03,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:03,025 INFO L87 Difference]: Start difference. First operand 557 states and 975 transitions. Second operand 5 states. [2020-12-22 06:20:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:03,345 INFO L93 Difference]: Finished difference Result 1601 states and 2831 transitions. [2020-12-22 06:20:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:03,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 06:20:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:03,353 INFO L225 Difference]: With dead ends: 1601 [2020-12-22 06:20:03,354 INFO L226 Difference]: Without dead ends: 1075 [2020-12-22 06:20:03,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:20:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-12-22 06:20:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 557. [2020-12-22 06:20:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2020-12-22 06:20:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 973 transitions. [2020-12-22 06:20:03,435 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 973 transitions. Word has length 68 [2020-12-22 06:20:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:03,435 INFO L481 AbstractCegarLoop]: Abstraction has 557 states and 973 transitions. [2020-12-22 06:20:03,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 973 transitions. [2020-12-22 06:20:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:20:03,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:03,445 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:20:03,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 06:20:03,445 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1499985260, now seen corresponding path program 1 times [2020-12-22 06:20:03,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:03,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279031408] [2020-12-22 06:20:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:03,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279031408] [2020-12-22 06:20:03,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:03,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:03,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221144808] [2020-12-22 06:20:03,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:03,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:03,546 INFO L87 Difference]: Start difference. First operand 557 states and 973 transitions. Second operand 3 states. [2020-12-22 06:20:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:03,643 INFO L93 Difference]: Finished difference Result 1599 states and 2823 transitions. [2020-12-22 06:20:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:03,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 06:20:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:03,657 INFO L225 Difference]: With dead ends: 1599 [2020-12-22 06:20:03,658 INFO L226 Difference]: Without dead ends: 1073 [2020-12-22 06:20:03,659 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 06:20:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-12-22 06:20:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 919. [2020-12-22 06:20:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-12-22 06:20:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1636 transitions. [2020-12-22 06:20:03,736 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1636 transitions. Word has length 69 [2020-12-22 06:20:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:03,737 INFO L481 AbstractCegarLoop]: Abstraction has 919 states and 1636 transitions. [2020-12-22 06:20:03,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1636 transitions. [2020-12-22 06:20:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 06:20:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:03,740 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 06:20:03,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 06:20:03,741 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2059574990, now seen corresponding path program 1 times [2020-12-22 06:20:03,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:03,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786235046] [2020-12-22 06:20:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:03,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786235046] [2020-12-22 06:20:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098676013] [2020-12-22 06:20:03,841 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 06:20:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 06:20:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:20:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:04,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:20:04,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 06:20:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287274169] [2020-12-22 06:20:04,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:04,598 INFO L87 Difference]: Start difference. First operand 919 states and 1636 transitions. Second operand 5 states. [2020-12-22 06:20:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:04,721 INFO L93 Difference]: Finished difference Result 1446 states and 2536 transitions. [2020-12-22 06:20:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 06:20:04,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 06:20:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:04,730 INFO L225 Difference]: With dead ends: 1446 [2020-12-22 06:20:04,730 INFO L226 Difference]: Without dead ends: 1292 [2020-12-22 06:20:04,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2020-12-22 06:20:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1135. [2020-12-22 06:20:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1135 states. [2020-12-22 06:20:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2026 transitions. [2020-12-22 06:20:04,831 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2026 transitions. Word has length 69 [2020-12-22 06:20:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:04,832 INFO L481 AbstractCegarLoop]: Abstraction has 1135 states and 2026 transitions. [2020-12-22 06:20:04,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2026 transitions. [2020-12-22 06:20:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 06:20:04,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:04,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:05,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 06:20:05,050 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1347977519, now seen corresponding path program 1 times [2020-12-22 06:20:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12082891] [2020-12-22 06:20:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:05,167 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 06:20:05,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12082891] [2020-12-22 06:20:05,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:05,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:05,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363626217] [2020-12-22 06:20:05,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:05,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:05,170 INFO L87 Difference]: Start difference. First operand 1135 states and 2026 transitions. Second operand 3 states. [2020-12-22 06:20:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:05,331 INFO L93 Difference]: Finished difference Result 3039 states and 5452 transitions. [2020-12-22 06:20:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:05,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 06:20:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:05,344 INFO L225 Difference]: With dead ends: 3039 [2020-12-22 06:20:05,344 INFO L226 Difference]: Without dead ends: 2005 [2020-12-22 06:20:05,347 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 06:20:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2020-12-22 06:20:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1851. [2020-12-22 06:20:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-12-22 06:20:05,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3331 transitions. [2020-12-22 06:20:05,492 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3331 transitions. Word has length 73 [2020-12-22 06:20:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:05,492 INFO L481 AbstractCegarLoop]: Abstraction has 1851 states and 3331 transitions. [2020-12-22 06:20:05,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3331 transitions. [2020-12-22 06:20:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 06:20:05,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:05,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:05,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 06:20:05,498 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1595318609, now seen corresponding path program 1 times [2020-12-22 06:20:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:05,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253248631] [2020-12-22 06:20:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:05,589 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 06:20:05,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253248631] [2020-12-22 06:20:05,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:05,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:05,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432487673] [2020-12-22 06:20:05,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:05,598 INFO L87 Difference]: Start difference. First operand 1851 states and 3331 transitions. Second operand 3 states. [2020-12-22 06:20:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:05,841 INFO L93 Difference]: Finished difference Result 4923 states and 8886 transitions. [2020-12-22 06:20:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:05,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 06:20:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:05,862 INFO L225 Difference]: With dead ends: 4923 [2020-12-22 06:20:05,863 INFO L226 Difference]: Without dead ends: 3207 [2020-12-22 06:20:05,867 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 06:20:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-12-22 06:20:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3053. [2020-12-22 06:20:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3053 states. [2020-12-22 06:20:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 5516 transitions. [2020-12-22 06:20:06,086 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 5516 transitions. Word has length 74 [2020-12-22 06:20:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:06,087 INFO L481 AbstractCegarLoop]: Abstraction has 3053 states and 5516 transitions. [2020-12-22 06:20:06,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 5516 transitions. [2020-12-22 06:20:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:20:06,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:06,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:06,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 06:20:06,093 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash 507433568, now seen corresponding path program 1 times [2020-12-22 06:20:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:06,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328240335] [2020-12-22 06:20:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:06,166 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 06:20:06,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328240335] [2020-12-22 06:20:06,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:06,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:06,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426814236] [2020-12-22 06:20:06,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:06,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:06,169 INFO L87 Difference]: Start difference. First operand 3053 states and 5516 transitions. Second operand 3 states. [2020-12-22 06:20:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:06,560 INFO L93 Difference]: Finished difference Result 8245 states and 14924 transitions. [2020-12-22 06:20:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:06,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 06:20:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:06,598 INFO L225 Difference]: With dead ends: 8245 [2020-12-22 06:20:06,598 INFO L226 Difference]: Without dead ends: 5361 [2020-12-22 06:20:06,605 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 06:20:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2020-12-22 06:20:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 5207. [2020-12-22 06:20:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5207 states. [2020-12-22 06:20:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5207 states to 5207 states and 9421 transitions. [2020-12-22 06:20:07,019 INFO L78 Accepts]: Start accepts. Automaton has 5207 states and 9421 transitions. Word has length 75 [2020-12-22 06:20:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:07,019 INFO L481 AbstractCegarLoop]: Abstraction has 5207 states and 9421 transitions. [2020-12-22 06:20:07,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5207 states and 9421 transitions. [2020-12-22 06:20:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 06:20:07,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:07,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:07,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 06:20:07,028 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1977880896, now seen corresponding path program 1 times [2020-12-22 06:20:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902047227] [2020-12-22 06:20:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:07,096 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 06:20:07,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902047227] [2020-12-22 06:20:07,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:07,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:07,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935540731] [2020-12-22 06:20:07,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:07,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:07,098 INFO L87 Difference]: Start difference. First operand 5207 states and 9421 transitions. Second operand 3 states. [2020-12-22 06:20:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:07,645 INFO L93 Difference]: Finished difference Result 15165 states and 27481 transitions. [2020-12-22 06:20:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:07,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 06:20:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:07,705 INFO L225 Difference]: With dead ends: 15165 [2020-12-22 06:20:07,705 INFO L226 Difference]: Without dead ends: 10131 [2020-12-22 06:20:07,716 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 06:20:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10131 states. [2020-12-22 06:20:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10131 to 9977. [2020-12-22 06:20:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9977 states. [2020-12-22 06:20:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 18062 transitions. [2020-12-22 06:20:08,396 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 18062 transitions. Word has length 76 [2020-12-22 06:20:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:08,397 INFO L481 AbstractCegarLoop]: Abstraction has 9977 states and 18062 transitions. [2020-12-22 06:20:08,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 18062 transitions. [2020-12-22 06:20:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 06:20:08,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:08,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:08,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 06:20:08,408 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289585, now seen corresponding path program 1 times [2020-12-22 06:20:08,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:08,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113381876] [2020-12-22 06:20:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:08,543 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 06:20:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113381876] [2020-12-22 06:20:08,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:08,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:08,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592924213] [2020-12-22 06:20:08,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:08,545 INFO L87 Difference]: Start difference. First operand 9977 states and 18062 transitions. Second operand 3 states. [2020-12-22 06:20:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:09,527 INFO L93 Difference]: Finished difference Result 29177 states and 52879 transitions. [2020-12-22 06:20:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:09,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 06:20:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:09,584 INFO L225 Difference]: With dead ends: 29177 [2020-12-22 06:20:09,585 INFO L226 Difference]: Without dead ends: 19381 [2020-12-22 06:20:09,603 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 06:20:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19381 states. [2020-12-22 06:20:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19381 to 19227. [2020-12-22 06:20:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19227 states. [2020-12-22 06:20:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19227 states to 19227 states and 34799 transitions. [2020-12-22 06:20:10,741 INFO L78 Accepts]: Start accepts. Automaton has 19227 states and 34799 transitions. Word has length 77 [2020-12-22 06:20:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:10,742 INFO L481 AbstractCegarLoop]: Abstraction has 19227 states and 34799 transitions. [2020-12-22 06:20:10,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19227 states and 34799 transitions. [2020-12-22 06:20:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 06:20:10,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:10,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:10,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 06:20:10,755 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash -403385214, now seen corresponding path program 1 times [2020-12-22 06:20:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:10,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99823786] [2020-12-22 06:20:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:10,822 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 06:20:10,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99823786] [2020-12-22 06:20:10,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:10,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035452383] [2020-12-22 06:20:10,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:10,824 INFO L87 Difference]: Start difference. First operand 19227 states and 34799 transitions. Second operand 3 states. [2020-12-22 06:20:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:12,840 INFO L93 Difference]: Finished difference Result 57113 states and 103404 transitions. [2020-12-22 06:20:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:12,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 06:20:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:12,967 INFO L225 Difference]: With dead ends: 57113 [2020-12-22 06:20:12,967 INFO L226 Difference]: Without dead ends: 38071 [2020-12-22 06:20:13,000 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 06:20:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38071 states. [2020-12-22 06:20:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38071 to 37917. [2020-12-22 06:20:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37917 states. [2020-12-22 06:20:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37917 states to 37917 states and 68528 transitions. [2020-12-22 06:20:14,873 INFO L78 Accepts]: Start accepts. Automaton has 37917 states and 68528 transitions. Word has length 78 [2020-12-22 06:20:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:14,873 INFO L481 AbstractCegarLoop]: Abstraction has 37917 states and 68528 transitions. [2020-12-22 06:20:14,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37917 states and 68528 transitions. [2020-12-22 06:20:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:20:14,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:14,890 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:20:14,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 06:20:14,890 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:14,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1481413290, now seen corresponding path program 1 times [2020-12-22 06:20:14,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:14,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659429943] [2020-12-22 06:20:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 06:20:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659429943] [2020-12-22 06:20:14,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:14,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:20:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780077714] [2020-12-22 06:20:14,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:20:14,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:20:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:20:14,974 INFO L87 Difference]: Start difference. First operand 37917 states and 68528 transitions. Second operand 5 states. [2020-12-22 06:20:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:17,987 INFO L93 Difference]: Finished difference Result 111454 states and 201397 transitions. [2020-12-22 06:20:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:20:17,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-12-22 06:20:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:18,180 INFO L225 Difference]: With dead ends: 111454 [2020-12-22 06:20:18,180 INFO L226 Difference]: Without dead ends: 73790 [2020-12-22 06:20:18,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:20:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73790 states. [2020-12-22 06:20:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73790 to 37917. [2020-12-22 06:20:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37917 states. [2020-12-22 06:20:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37917 states to 37917 states and 68270 transitions. [2020-12-22 06:20:20,775 INFO L78 Accepts]: Start accepts. Automaton has 37917 states and 68270 transitions. Word has length 79 [2020-12-22 06:20:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:20,775 INFO L481 AbstractCegarLoop]: Abstraction has 37917 states and 68270 transitions. [2020-12-22 06:20:20,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:20:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 37917 states and 68270 transitions. [2020-12-22 06:20:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:20:20,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:20,789 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 06:20:20,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 06:20:20,789 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2041003020, now seen corresponding path program 2 times [2020-12-22 06:20:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:20,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151498745] [2020-12-22 06:20:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:20:20,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151498745] [2020-12-22 06:20:20,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:20,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:20,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971791928] [2020-12-22 06:20:20,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:20,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:20,851 INFO L87 Difference]: Start difference. First operand 37917 states and 68270 transitions. Second operand 3 states. [2020-12-22 06:20:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:22,346 INFO L93 Difference]: Finished difference Result 75729 states and 136358 transitions. [2020-12-22 06:20:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:22,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 06:20:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:22,420 INFO L225 Difference]: With dead ends: 75729 [2020-12-22 06:20:22,420 INFO L226 Difference]: Without dead ends: 38071 [2020-12-22 06:20:22,454 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 06:20:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38071 states. [2020-12-22 06:20:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38071 to 37917. [2020-12-22 06:20:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37917 states. [2020-12-22 06:20:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37917 states to 37917 states and 68142 transitions. [2020-12-22 06:20:24,053 INFO L78 Accepts]: Start accepts. Automaton has 37917 states and 68142 transitions. Word has length 79 [2020-12-22 06:20:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:24,054 INFO L481 AbstractCegarLoop]: Abstraction has 37917 states and 68142 transitions. [2020-12-22 06:20:24,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37917 states and 68142 transitions. [2020-12-22 06:20:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:20:24,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:24,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:20:24,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 06:20:24,067 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2012028511, now seen corresponding path program 1 times [2020-12-22 06:20:24,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:24,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278957441] [2020-12-22 06:20:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:24,128 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 06:20:24,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278957441] [2020-12-22 06:20:24,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:24,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246444970] [2020-12-22 06:20:24,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 06:20:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 06:20:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 06:20:24,130 INFO L87 Difference]: Start difference. First operand 37917 states and 68142 transitions. Second operand 3 states. [2020-12-22 06:20:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:26,559 INFO L93 Difference]: Finished difference Result 105339 states and 189040 transitions. [2020-12-22 06:20:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 06:20:26,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 06:20:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:26,670 INFO L225 Difference]: With dead ends: 105339 [2020-12-22 06:20:26,671 INFO L226 Difference]: Without dead ends: 67641 [2020-12-22 06:20:26,708 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 06:20:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67641 states. [2020-12-22 06:20:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67641 to 67487. [2020-12-22 06:20:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67487 states. [2020-12-22 06:20:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67487 states to 67487 states and 120751 transitions. [2020-12-22 06:20:29,878 INFO L78 Accepts]: Start accepts. Automaton has 67487 states and 120751 transitions. Word has length 79 [2020-12-22 06:20:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:29,878 INFO L481 AbstractCegarLoop]: Abstraction has 67487 states and 120751 transitions. [2020-12-22 06:20:29,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 06:20:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 67487 states and 120751 transitions. [2020-12-22 06:20:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 06:20:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:29,894 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:20:29,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 06:20:29,894 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2098561350, now seen corresponding path program 1 times [2020-12-22 06:20:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243487806] [2020-12-22 06:20:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:20:30,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243487806] [2020-12-22 06:20:30,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:30,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 06:20:30,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363776754] [2020-12-22 06:20:30,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:20:30,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:20:30,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:20:30,021 INFO L87 Difference]: Start difference. First operand 67487 states and 120751 transitions. Second operand 9 states. [2020-12-22 06:20:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:35,634 INFO L93 Difference]: Finished difference Result 136077 states and 243246 transitions. [2020-12-22 06:20:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 06:20:35,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-12-22 06:20:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:36,030 INFO L225 Difference]: With dead ends: 136077 [2020-12-22 06:20:36,030 INFO L226 Difference]: Without dead ends: 135943 [2020-12-22 06:20:36,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:20:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135943 states. [2020-12-22 06:20:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135943 to 134736. [2020-12-22 06:20:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134736 states. [2020-12-22 06:20:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134736 states to 134736 states and 241112 transitions. [2020-12-22 06:20:42,084 INFO L78 Accepts]: Start accepts. Automaton has 134736 states and 241112 transitions. Word has length 80 [2020-12-22 06:20:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:42,087 INFO L481 AbstractCegarLoop]: Abstraction has 134736 states and 241112 transitions. [2020-12-22 06:20:42,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:20:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 134736 states and 241112 transitions. [2020-12-22 06:20:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 06:20:42,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:42,110 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:20:42,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 06:20:42,111 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1144390756, now seen corresponding path program 1 times [2020-12-22 06:20:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:42,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186019935] [2020-12-22 06:20:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:20:42,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186019935] [2020-12-22 06:20:42,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:42,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:20:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660919894] [2020-12-22 06:20:42,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:20:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:20:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:20:42,255 INFO L87 Difference]: Start difference. First operand 134736 states and 241112 transitions. Second operand 6 states. [2020-12-22 06:20:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:46,948 INFO L93 Difference]: Finished difference Result 134994 states and 241528 transitions. [2020-12-22 06:20:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:20:46,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 06:20:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:20:47,188 INFO L225 Difference]: With dead ends: 134994 [2020-12-22 06:20:47,188 INFO L226 Difference]: Without dead ends: 134779 [2020-12-22 06:20:47,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:20:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134779 states. [2020-12-22 06:20:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134779 to 134724. [2020-12-22 06:20:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134724 states. [2020-12-22 06:20:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134724 states to 134724 states and 241085 transitions. [2020-12-22 06:20:53,007 INFO L78 Accepts]: Start accepts. Automaton has 134724 states and 241085 transitions. Word has length 81 [2020-12-22 06:20:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:20:53,007 INFO L481 AbstractCegarLoop]: Abstraction has 134724 states and 241085 transitions. [2020-12-22 06:20:53,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:20:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 134724 states and 241085 transitions. [2020-12-22 06:20:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 06:20:53,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:20:53,025 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:20:53,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 06:20:53,025 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:20:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:20:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash 739477552, now seen corresponding path program 1 times [2020-12-22 06:20:53,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:20:53,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292930576] [2020-12-22 06:20:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:20:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:20:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:20:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292930576] [2020-12-22 06:20:53,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:20:53,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 06:20:53,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761000384] [2020-12-22 06:20:53,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 06:20:53,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:20:53,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 06:20:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 06:20:53,097 INFO L87 Difference]: Start difference. First operand 134724 states and 241085 transitions. Second operand 4 states. [2020-12-22 06:20:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:20:59,841 INFO L93 Difference]: Finished difference Result 202697 states and 362605 transitions. [2020-12-22 06:20:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:20:59,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 06:20:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:00,359 INFO L225 Difference]: With dead ends: 202697 [2020-12-22 06:21:00,359 INFO L226 Difference]: Without dead ends: 202494 [2020-12-22 06:21:00,402 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 06:21:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202494 states. [2020-12-22 06:21:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202494 to 202047. [2020-12-22 06:21:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202047 states. [2020-12-22 06:21:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202047 states to 202047 states and 361559 transitions. [2020-12-22 06:21:09,463 INFO L78 Accepts]: Start accepts. Automaton has 202047 states and 361559 transitions. Word has length 81 [2020-12-22 06:21:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:09,463 INFO L481 AbstractCegarLoop]: Abstraction has 202047 states and 361559 transitions. [2020-12-22 06:21:09,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 06:21:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 202047 states and 361559 transitions. [2020-12-22 06:21:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 06:21:09,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:09,495 INFO L422 BasicCegarLoop]: trace histogram [3, 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 06:21:09,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 06:21:09,495 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash 605464046, now seen corresponding path program 1 times [2020-12-22 06:21:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:09,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175846817] [2020-12-22 06:21:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:21:09,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175846817] [2020-12-22 06:21:09,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 06:21:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063536791] [2020-12-22 06:21:09,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:21:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:21:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:21:09,607 INFO L87 Difference]: Start difference. First operand 202047 states and 361559 transitions. Second operand 9 states. [2020-12-22 06:21:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:21:17,540 INFO L93 Difference]: Finished difference Result 203521 states and 363872 transitions. [2020-12-22 06:21:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:21:17,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2020-12-22 06:21:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:21:17,974 INFO L225 Difference]: With dead ends: 203521 [2020-12-22 06:21:17,974 INFO L226 Difference]: Without dead ends: 203262 [2020-12-22 06:21:18,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-12-22 06:21:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203262 states. [2020-12-22 06:21:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203262 to 202103. [2020-12-22 06:21:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202103 states. [2020-12-22 06:21:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202103 states to 202103 states and 361641 transitions. [2020-12-22 06:21:27,259 INFO L78 Accepts]: Start accepts. Automaton has 202103 states and 361641 transitions. Word has length 81 [2020-12-22 06:21:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:21:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 202103 states and 361641 transitions. [2020-12-22 06:21:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:21:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 202103 states and 361641 transitions. [2020-12-22 06:21:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 06:21:27,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:21:27,281 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:21:27,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 06:21:27,281 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:21:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:21:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash -919458278, now seen corresponding path program 1 times [2020-12-22 06:21:27,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:21:27,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793947772] [2020-12-22 06:21:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:21:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:21:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 06:21:27,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793947772] [2020-12-22 06:21:27,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:21:27,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 06:21:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462130721] [2020-12-22 06:21:27,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 06:21:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:21:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 06:21:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:21:27,457 INFO L87 Difference]: Start difference. First operand 202103 states and 361641 transitions. Second operand 11 states.