/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:57:29,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:57:29,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:57:29,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:57:29,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:57:29,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:57:29,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:57:29,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:57:29,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:57:29,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:57:29,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:57:29,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:57:29,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:57:29,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:57:29,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:57:29,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:57:29,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:57:29,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:57:29,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:57:29,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:57:29,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:57:29,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:57:29,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:57:29,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:57:29,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:57:29,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:57:29,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:57:29,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:57:29,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:57:29,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:57:29,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:57:29,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:57:29,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:57:29,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:57:29,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:57:29,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:57:29,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:57:29,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:57:29,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:57:29,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:57:29,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:57:29,463 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:57:29,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:57:29,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:57:29,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:57:29,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:57:29,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:57:29,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:57:29,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:57:29,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:57:29,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:57:29,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:57:29,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:57:29,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:57:29,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:57:29,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:57:29,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:57:29,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:57:29,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:57:29,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:57:29,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:57:29,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:57:29,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:57:29,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:57:29,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:57:29,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:57:29,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:57:29,989 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:57:29,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:57:30,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109e86207/e5e121c9b0954893bdc6155f1adc44b9/FLAG40dbe4975 [2020-12-22 09:57:31,280 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:57:31,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:57:31,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109e86207/e5e121c9b0954893bdc6155f1adc44b9/FLAG40dbe4975 [2020-12-22 09:57:31,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/109e86207/e5e121c9b0954893bdc6155f1adc44b9 [2020-12-22 09:57:31,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:57:31,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:57:31,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:57:31,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:57:31,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:57:31,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:57:31" (1/1) ... [2020-12-22 09:57:31,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666bd3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:31, skipping insertion in model container [2020-12-22 09:57:31,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:57:31" (1/1) ... [2020-12-22 09:57:31,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:57:31,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:57:32,286 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[11758,11771] [2020-12-22 09:57:32,318 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[12357,12370] [2020-12-22 09:57:33,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:57:33,670 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:57:33,755 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[11758,11771] [2020-12-22 09:57:33,761 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c[12357,12370] [2020-12-22 09:57:34,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:57:34,448 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:57:34,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34 WrapperNode [2020-12-22 09:57:34,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:57:34,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:57:34,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:57:34,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:57:34,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:34,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:57:35,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:57:35,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:57:35,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:57:35,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... [2020-12-22 09:57:35,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:57:35,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:57:35,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:57:35,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:57:35,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:57:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:57:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:57:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:57:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:57:41,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:57:41,015 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:57:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:41 BoogieIcfgContainer [2020-12-22 09:57:41,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:57:41,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:57:41,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:57:41,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:57:41,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:57:31" (1/3) ... [2020-12-22 09:57:41,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6af6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:41, skipping insertion in model container [2020-12-22 09:57:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:57:34" (2/3) ... [2020-12-22 09:57:41,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd6af6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:57:41, skipping insertion in model container [2020-12-22 09:57:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:57:41" (3/3) ... [2020-12-22 09:57:41,028 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label07.c [2020-12-22 09:57:41,035 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:57:41,041 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:57:41,061 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:57:41,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:57:41,098 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:57:41,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:57:41,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:57:41,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:57:41,099 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:57:41,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:57:41,099 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:57:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:57:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:57:41,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:41,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:41,150 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2083311085, now seen corresponding path program 1 times [2020-12-22 09:57:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:41,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454639673] [2020-12-22 09:57:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454639673] [2020-12-22 09:57:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:57:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418946065] [2020-12-22 09:57:41,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:41,465 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 3 states. [2020-12-22 09:57:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:46,818 INFO L93 Difference]: Finished difference Result 2536 states and 4878 transitions. [2020-12-22 09:57:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:46,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:57:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:46,855 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:57:46,855 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:57:46,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:57:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:57:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:57:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2498 transitions. [2020-12-22 09:57:46,994 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2498 transitions. Word has length 7 [2020-12-22 09:57:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:46,995 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2498 transitions. [2020-12-22 09:57:46,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2498 transitions. [2020-12-22 09:57:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:57:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:46,997 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] [2020-12-22 09:57:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:57:46,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:57:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:46,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932811399] [2020-12-22 09:57:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932811399] [2020-12-22 09:57:47,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:47,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982243874] [2020-12-22 09:57:47,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:47,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:47,193 INFO L87 Difference]: Start difference. First operand 1595 states and 2498 transitions. Second operand 5 states. [2020-12-22 09:57:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:47,290 INFO L93 Difference]: Finished difference Result 1652 states and 2586 transitions. [2020-12-22 09:57:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:57:47,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:57:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:47,299 INFO L225 Difference]: With dead ends: 1652 [2020-12-22 09:57:47,300 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:57:47,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:57:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:57:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:57:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2467 transitions. [2020-12-22 09:57:47,341 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2467 transitions. Word has length 34 [2020-12-22 09:57:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:47,341 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2467 transitions. [2020-12-22 09:57:47,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2467 transitions. [2020-12-22 09:57:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:47,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:47,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:47,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:57:47,345 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:57:47,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:47,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457498667] [2020-12-22 09:57:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:47,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457498667] [2020-12-22 09:57:47,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:47,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708272385] [2020-12-22 09:57:47,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:47,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:47,515 INFO L87 Difference]: Start difference. First operand 1595 states and 2467 transitions. Second operand 3 states. [2020-12-22 09:57:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:47,556 INFO L93 Difference]: Finished difference Result 1695 states and 2625 transitions. [2020-12-22 09:57:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:47,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:57:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:47,569 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:57:47,570 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:57:47,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:57:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:57:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:57:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2539 transitions. [2020-12-22 09:57:47,629 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2539 transitions. Word has length 64 [2020-12-22 09:57:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:47,630 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2539 transitions. [2020-12-22 09:57:47,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2539 transitions. [2020-12-22 09:57:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:57:47,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:47,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:47,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:57:47,639 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:57:47,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:47,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590369473] [2020-12-22 09:57:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:47,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590369473] [2020-12-22 09:57:47,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:47,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:47,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799391947] [2020-12-22 09:57:47,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:47,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:47,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:47,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:47,841 INFO L87 Difference]: Start difference. First operand 1640 states and 2539 transitions. Second operand 7 states. [2020-12-22 09:57:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:48,130 INFO L93 Difference]: Finished difference Result 2620 states and 4099 transitions. [2020-12-22 09:57:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:57:48,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:57:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:48,146 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:57:48,146 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:57:48,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:57:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:57:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:57:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:57:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2690 transitions. [2020-12-22 09:57:48,259 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2690 transitions. Word has length 64 [2020-12-22 09:57:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:48,262 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 2690 transitions. [2020-12-22 09:57:48,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2690 transitions. [2020-12-22 09:57:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:48,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:48,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:48,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:57:48,266 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:57:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:48,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381768606] [2020-12-22 09:57:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:48,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381768606] [2020-12-22 09:57:48,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:48,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233041036] [2020-12-22 09:57:48,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:48,392 INFO L87 Difference]: Start difference. First operand 1736 states and 2690 transitions. Second operand 3 states. [2020-12-22 09:57:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:48,454 INFO L93 Difference]: Finished difference Result 2102 states and 3266 transitions. [2020-12-22 09:57:48,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:48,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:48,465 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:57:48,466 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:57:48,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:57:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:57:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:57:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2944 transitions. [2020-12-22 09:57:48,522 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2944 transitions. Word has length 66 [2020-12-22 09:57:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:48,523 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2944 transitions. [2020-12-22 09:57:48,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2944 transitions. [2020-12-22 09:57:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:48,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:48,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:48,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:57:48,525 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:57:48,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:48,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127299922] [2020-12-22 09:57:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127299922] [2020-12-22 09:57:48,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:48,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:57:48,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509569269] [2020-12-22 09:57:48,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:57:48,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:57:48,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:57:48,748 INFO L87 Difference]: Start difference. First operand 1902 states and 2944 transitions. Second operand 7 states. [2020-12-22 09:57:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:49,003 INFO L93 Difference]: Finished difference Result 2264 states and 3506 transitions. [2020-12-22 09:57:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:49,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:57:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:49,015 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:57:49,015 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:57:49,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:57:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:57:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:57:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:57:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2940 transitions. [2020-12-22 09:57:49,074 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2940 transitions. Word has length 66 [2020-12-22 09:57:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:49,075 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2940 transitions. [2020-12-22 09:57:49,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:57:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2940 transitions. [2020-12-22 09:57:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:49,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:49,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:57:49,077 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:57:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:49,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839805633] [2020-12-22 09:57:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:49,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839805633] [2020-12-22 09:57:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585663265] [2020-12-22 09:57:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,138 INFO L87 Difference]: Start difference. First operand 1902 states and 2940 transitions. Second operand 3 states. [2020-12-22 09:57:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:49,206 INFO L93 Difference]: Finished difference Result 2574 states and 3974 transitions. [2020-12-22 09:57:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:49,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:49,221 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:57:49,221 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:57:49,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:57:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:57:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:57:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3408 transitions. [2020-12-22 09:57:49,298 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3408 transitions. Word has length 66 [2020-12-22 09:57:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:49,298 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3408 transitions. [2020-12-22 09:57:49,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3408 transitions. [2020-12-22 09:57:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:49,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:49,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:49,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:57:49,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:49,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:57:49,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:49,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081018420] [2020-12-22 09:57:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081018420] [2020-12-22 09:57:49,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:49,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:49,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950630831] [2020-12-22 09:57:49,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,390 INFO L87 Difference]: Start difference. First operand 2212 states and 3408 transitions. Second operand 3 states. [2020-12-22 09:57:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:49,489 INFO L93 Difference]: Finished difference Result 3456 states and 5298 transitions. [2020-12-22 09:57:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:49,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:49,505 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:57:49,505 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:57:49,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:57:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:57:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:57:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4256 transitions. [2020-12-22 09:57:49,648 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4256 transitions. Word has length 66 [2020-12-22 09:57:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:49,648 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4256 transitions. [2020-12-22 09:57:49,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4256 transitions. [2020-12-22 09:57:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:57:49,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:49,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:49,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:57:49,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:57:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:49,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667099700] [2020-12-22 09:57:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667099700] [2020-12-22 09:57:49,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:49,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:49,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740636944] [2020-12-22 09:57:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,718 INFO L87 Difference]: Start difference. First operand 2784 states and 4256 transitions. Second operand 3 states. [2020-12-22 09:57:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:49,875 INFO L93 Difference]: Finished difference Result 5076 states and 7682 transitions. [2020-12-22 09:57:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:49,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:57:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:49,897 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:57:49,897 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:57:49,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:57:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:57:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:57:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5776 transitions. [2020-12-22 09:57:50,090 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5776 transitions. Word has length 66 [2020-12-22 09:57:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:50,090 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 5776 transitions. [2020-12-22 09:57:50,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5776 transitions. [2020-12-22 09:57:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:57:50,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:50,093 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] [2020-12-22 09:57:50,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:57:50,094 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:57:50,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:50,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557086488] [2020-12-22 09:57:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557086488] [2020-12-22 09:57:50,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:50,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:57:50,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356752518] [2020-12-22 09:57:50,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:57:50,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:57:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:57:50,198 INFO L87 Difference]: Start difference. First operand 3832 states and 5776 transitions. Second operand 5 states. [2020-12-22 09:57:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:50,578 INFO L93 Difference]: Finished difference Result 5558 states and 8278 transitions. [2020-12-22 09:57:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:57:50,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:57:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:50,631 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:57:50,633 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:57:50,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:57:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:57:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:57:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:57:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5856 transitions. [2020-12-22 09:57:50,892 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5856 transitions. Word has length 67 [2020-12-22 09:57:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:50,893 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 5856 transitions. [2020-12-22 09:57:50,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:57:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5856 transitions. [2020-12-22 09:57:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:57:50,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:50,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:50,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:57:50,897 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:57:50,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642049516] [2020-12-22 09:57:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:50,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642049516] [2020-12-22 09:57:50,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:50,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:50,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042449712] [2020-12-22 09:57:50,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:50,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:50,972 INFO L87 Difference]: Start difference. First operand 3928 states and 5856 transitions. Second operand 3 states. [2020-12-22 09:57:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:51,257 INFO L93 Difference]: Finished difference Result 6367 states and 9446 transitions. [2020-12-22 09:57:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:51,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:57:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:51,273 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:57:51,274 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:57:51,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:57:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:57:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:57:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7410 transitions. [2020-12-22 09:57:51,615 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7410 transitions. Word has length 68 [2020-12-22 09:57:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:51,615 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7410 transitions. [2020-12-22 09:57:51,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7410 transitions. [2020-12-22 09:57:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:57:51,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:51,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:51,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:57:51,617 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2083840669, now seen corresponding path program 1 times [2020-12-22 09:57:51,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:51,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306697921] [2020-12-22 09:57:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 09:57:51,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306697921] [2020-12-22 09:57:51,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:51,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:57:51,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773735589] [2020-12-22 09:57:51,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:57:51,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:57:51,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:51,722 INFO L87 Difference]: Start difference. First operand 5018 states and 7410 transitions. Second operand 3 states. [2020-12-22 09:57:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:57:57,468 INFO L93 Difference]: Finished difference Result 8024 states and 12097 transitions. [2020-12-22 09:57:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:57:57,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 09:57:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:57:57,487 INFO L225 Difference]: With dead ends: 8024 [2020-12-22 09:57:57,488 INFO L226 Difference]: Without dead ends: 6520 [2020-12-22 09:57:57,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:57:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2020-12-22 09:57:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2020-12-22 09:57:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6520 states. [2020-12-22 09:57:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9188 transitions. [2020-12-22 09:57:57,909 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9188 transitions. Word has length 78 [2020-12-22 09:57:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:57,909 INFO L481 AbstractCegarLoop]: Abstraction has 6520 states and 9188 transitions. [2020-12-22 09:57:57,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:57:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9188 transitions. [2020-12-22 09:57:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:57:57,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:57,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:57,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:57:57,912 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash -864627922, now seen corresponding path program 1 times [2020-12-22 09:57:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:57,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884613086] [2020-12-22 09:57:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:58,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884613086] [2020-12-22 09:57:58,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:57:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:57:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014618462] [2020-12-22 09:57:58,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:57:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:57:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:57:58,040 INFO L87 Difference]: Start difference. First operand 6520 states and 9188 transitions. Second operand 4 states. [2020-12-22 09:58:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:06,524 INFO L93 Difference]: Finished difference Result 13281 states and 18230 transitions. [2020-12-22 09:58:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:58:06,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 09:58:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:06,546 INFO L225 Difference]: With dead ends: 13281 [2020-12-22 09:58:06,546 INFO L226 Difference]: Without dead ends: 10275 [2020-12-22 09:58:06,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:58:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2020-12-22 09:58:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 10275. [2020-12-22 09:58:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10275 states. [2020-12-22 09:58:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10275 states to 10275 states and 13946 transitions. [2020-12-22 09:58:06,940 INFO L78 Accepts]: Start accepts. Automaton has 10275 states and 13946 transitions. Word has length 84 [2020-12-22 09:58:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:06,940 INFO L481 AbstractCegarLoop]: Abstraction has 10275 states and 13946 transitions. [2020-12-22 09:58:06,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:58:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10275 states and 13946 transitions. [2020-12-22 09:58:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:58:06,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:06,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:06,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:58:06,944 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:58:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:06,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104282706] [2020-12-22 09:58:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:58:07,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104282706] [2020-12-22 09:58:07,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:07,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:07,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114312003] [2020-12-22 09:58:07,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:07,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:07,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:07,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:07,070 INFO L87 Difference]: Start difference. First operand 10275 states and 13946 transitions. Second operand 7 states. [2020-12-22 09:58:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:08,173 INFO L93 Difference]: Finished difference Result 28351 states and 40048 transitions. [2020-12-22 09:58:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:08,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:58:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:08,227 INFO L225 Difference]: With dead ends: 28351 [2020-12-22 09:58:08,227 INFO L226 Difference]: Without dead ends: 24877 [2020-12-22 09:58:08,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:58:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2020-12-22 09:58:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 13747. [2020-12-22 09:58:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13747 states. [2020-12-22 09:58:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13747 states to 13747 states and 18922 transitions. [2020-12-22 09:58:08,926 INFO L78 Accepts]: Start accepts. Automaton has 13747 states and 18922 transitions. Word has length 94 [2020-12-22 09:58:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:08,927 INFO L481 AbstractCegarLoop]: Abstraction has 13747 states and 18922 transitions. [2020-12-22 09:58:08,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 13747 states and 18922 transitions. [2020-12-22 09:58:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:58:08,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:08,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:08,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:58:08,931 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:58:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:08,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919023513] [2020-12-22 09:58:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:58:09,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919023513] [2020-12-22 09:58:09,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:09,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:09,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403072085] [2020-12-22 09:58:09,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:09,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:09,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:09,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:09,042 INFO L87 Difference]: Start difference. First operand 13747 states and 18922 transitions. Second operand 7 states. [2020-12-22 09:58:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:10,476 INFO L93 Difference]: Finished difference Result 31823 states and 45024 transitions. [2020-12-22 09:58:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:10,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:58:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:10,532 INFO L225 Difference]: With dead ends: 31823 [2020-12-22 09:58:10,533 INFO L226 Difference]: Without dead ends: 28349 [2020-12-22 09:58:10,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:58:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28349 states. [2020-12-22 09:58:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28349 to 18963. [2020-12-22 09:58:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18963 states. [2020-12-22 09:58:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18963 states to 18963 states and 26346 transitions. [2020-12-22 09:58:11,870 INFO L78 Accepts]: Start accepts. Automaton has 18963 states and 26346 transitions. Word has length 94 [2020-12-22 09:58:11,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:11,870 INFO L481 AbstractCegarLoop]: Abstraction has 18963 states and 26346 transitions. [2020-12-22 09:58:11,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18963 states and 26346 transitions. [2020-12-22 09:58:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:58:11,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:11,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:11,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:58:11,876 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:58:11,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:11,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489255434] [2020-12-22 09:58:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:58:11,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489255434] [2020-12-22 09:58:11,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:11,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:11,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513559628] [2020-12-22 09:58:11,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:11,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:11,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:11,987 INFO L87 Difference]: Start difference. First operand 18963 states and 26346 transitions. Second operand 7 states. [2020-12-22 09:58:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:13,260 INFO L93 Difference]: Finished difference Result 35295 states and 50000 transitions. [2020-12-22 09:58:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:13,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:58:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:13,305 INFO L225 Difference]: With dead ends: 35295 [2020-12-22 09:58:13,305 INFO L226 Difference]: Without dead ends: 31821 [2020-12-22 09:58:13,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:58:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31821 states. [2020-12-22 09:58:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31821 to 22435. [2020-12-22 09:58:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22435 states. [2020-12-22 09:58:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22435 states to 22435 states and 31322 transitions. [2020-12-22 09:58:14,620 INFO L78 Accepts]: Start accepts. Automaton has 22435 states and 31322 transitions. Word has length 94 [2020-12-22 09:58:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:14,620 INFO L481 AbstractCegarLoop]: Abstraction has 22435 states and 31322 transitions. [2020-12-22 09:58:14,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22435 states and 31322 transitions. [2020-12-22 09:58:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:58:14,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:14,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:14,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:58:14,626 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:58:14,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:14,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752204323] [2020-12-22 09:58:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:58:14,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752204323] [2020-12-22 09:58:14,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:14,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:14,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327776486] [2020-12-22 09:58:14,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:14,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:14,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:14,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:14,740 INFO L87 Difference]: Start difference. First operand 22435 states and 31322 transitions. Second operand 7 states. [2020-12-22 09:58:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:16,527 INFO L93 Difference]: Finished difference Result 38767 states and 54976 transitions. [2020-12-22 09:58:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:16,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:58:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:16,575 INFO L225 Difference]: With dead ends: 38767 [2020-12-22 09:58:16,575 INFO L226 Difference]: Without dead ends: 35293 [2020-12-22 09:58:16,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:58:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35293 states. [2020-12-22 09:58:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35293 to 25907. [2020-12-22 09:58:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25907 states. [2020-12-22 09:58:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25907 states to 25907 states and 36298 transitions. [2020-12-22 09:58:17,951 INFO L78 Accepts]: Start accepts. Automaton has 25907 states and 36298 transitions. Word has length 94 [2020-12-22 09:58:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:17,951 INFO L481 AbstractCegarLoop]: Abstraction has 25907 states and 36298 transitions. [2020-12-22 09:58:17,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25907 states and 36298 transitions. [2020-12-22 09:58:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:58:17,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:17,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:17,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:58:17,959 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:58:17,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:17,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388501679] [2020-12-22 09:58:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:18,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388501679] [2020-12-22 09:58:18,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:18,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:18,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966520597] [2020-12-22 09:58:18,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:18,045 INFO L87 Difference]: Start difference. First operand 25907 states and 36298 transitions. Second operand 3 states. [2020-12-22 09:58:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:18,896 INFO L93 Difference]: Finished difference Result 39316 states and 55695 transitions. [2020-12-22 09:58:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:18,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:58:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:18,917 INFO L225 Difference]: With dead ends: 39316 [2020-12-22 09:58:18,917 INFO L226 Difference]: Without dead ends: 20210 [2020-12-22 09:58:18,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20210 states. [2020-12-22 09:58:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20210 to 20208. [2020-12-22 09:58:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20208 states. [2020-12-22 09:58:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20208 states to 20208 states and 28140 transitions. [2020-12-22 09:58:19,763 INFO L78 Accepts]: Start accepts. Automaton has 20208 states and 28140 transitions. Word has length 96 [2020-12-22 09:58:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:19,768 INFO L481 AbstractCegarLoop]: Abstraction has 20208 states and 28140 transitions. [2020-12-22 09:58:19,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 20208 states and 28140 transitions. [2020-12-22 09:58:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:58:19,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:19,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:19,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:58:19,774 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:19,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:58:19,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:19,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125239971] [2020-12-22 09:58:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:58:20,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125239971] [2020-12-22 09:58:20,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:20,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:58:20,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172723875] [2020-12-22 09:58:20,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:58:20,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:20,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:58:20,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:58:20,010 INFO L87 Difference]: Start difference. First operand 20208 states and 28140 transitions. Second operand 7 states. [2020-12-22 09:58:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:21,545 INFO L93 Difference]: Finished difference Result 32380 states and 45746 transitions. [2020-12-22 09:58:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:58:21,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:58:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:21,587 INFO L225 Difference]: With dead ends: 32380 [2020-12-22 09:58:21,587 INFO L226 Difference]: Without dead ends: 29946 [2020-12-22 09:58:21,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:58:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29946 states. [2020-12-22 09:58:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29946 to 22640. [2020-12-22 09:58:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22640 states. [2020-12-22 09:58:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22640 states to 22640 states and 31628 transitions. [2020-12-22 09:58:22,706 INFO L78 Accepts]: Start accepts. Automaton has 22640 states and 31628 transitions. Word has length 96 [2020-12-22 09:58:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:22,706 INFO L481 AbstractCegarLoop]: Abstraction has 22640 states and 31628 transitions. [2020-12-22 09:58:22,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:58:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 22640 states and 31628 transitions. [2020-12-22 09:58:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:22,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:22,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:22,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:58:22,712 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:58:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:22,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033680385] [2020-12-22 09:58:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:22,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033680385] [2020-12-22 09:58:22,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:22,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:22,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605788328] [2020-12-22 09:58:22,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:22,781 INFO L87 Difference]: Start difference. First operand 22640 states and 31628 transitions. Second operand 3 states. [2020-12-22 09:58:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:23,458 INFO L93 Difference]: Finished difference Result 30548 states and 42966 transitions. [2020-12-22 09:58:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:23,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:23,476 INFO L225 Difference]: With dead ends: 30548 [2020-12-22 09:58:23,476 INFO L226 Difference]: Without dead ends: 14738 [2020-12-22 09:58:23,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14738 states. [2020-12-22 09:58:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14738 to 14736. [2020-12-22 09:58:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14736 states. [2020-12-22 09:58:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14736 states to 14736 states and 20188 transitions. [2020-12-22 09:58:24,130 INFO L78 Accepts]: Start accepts. Automaton has 14736 states and 20188 transitions. Word has length 97 [2020-12-22 09:58:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:24,130 INFO L481 AbstractCegarLoop]: Abstraction has 14736 states and 20188 transitions. [2020-12-22 09:58:24,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 14736 states and 20188 transitions. [2020-12-22 09:58:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:24,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:24,133 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:24,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:58:24,133 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:58:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:24,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121982075] [2020-12-22 09:58:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:24,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121982075] [2020-12-22 09:58:24,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:24,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789068042] [2020-12-22 09:58:24,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:24,200 INFO L87 Difference]: Start difference. First operand 14736 states and 20188 transitions. Second operand 3 states. [2020-12-22 09:58:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:24,723 INFO L93 Difference]: Finished difference Result 18692 states and 25806 transitions. [2020-12-22 09:58:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:24,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:24,744 INFO L225 Difference]: With dead ends: 18692 [2020-12-22 09:58:24,745 INFO L226 Difference]: Without dead ends: 10786 [2020-12-22 09:58:24,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2020-12-22 09:58:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 10784. [2020-12-22 09:58:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10784 states. [2020-12-22 09:58:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10784 states to 10784 states and 14520 transitions. [2020-12-22 09:58:25,251 INFO L78 Accepts]: Start accepts. Automaton has 10784 states and 14520 transitions. Word has length 97 [2020-12-22 09:58:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:25,252 INFO L481 AbstractCegarLoop]: Abstraction has 10784 states and 14520 transitions. [2020-12-22 09:58:25,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 10784 states and 14520 transitions. [2020-12-22 09:58:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:25,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:25,255 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:25,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:58:25,255 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:58:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:25,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300289648] [2020-12-22 09:58:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300289648] [2020-12-22 09:58:25,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:58:25,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:58:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490380634] [2020-12-22 09:58:25,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:58:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:58:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:25,341 INFO L87 Difference]: Start difference. First operand 10784 states and 14520 transitions. Second operand 3 states. [2020-12-22 09:58:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:25,587 INFO L93 Difference]: Finished difference Result 12764 states and 17304 transitions. [2020-12-22 09:58:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:58:25,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:58:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:25,600 INFO L225 Difference]: With dead ends: 12764 [2020-12-22 09:58:25,600 INFO L226 Difference]: Without dead ends: 8810 [2020-12-22 09:58:25,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:58:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8810 states. [2020-12-22 09:58:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8810 to 8808. [2020-12-22 09:58:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8808 states. [2020-12-22 09:58:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 11712 transitions. [2020-12-22 09:58:25,896 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 11712 transitions. Word has length 97 [2020-12-22 09:58:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:25,897 INFO L481 AbstractCegarLoop]: Abstraction has 8808 states and 11712 transitions. [2020-12-22 09:58:25,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:58:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 11712 transitions. [2020-12-22 09:58:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:58:25,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:25,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:25,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:58:25,899 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:58:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:25,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936052989] [2020-12-22 09:58:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936052989] [2020-12-22 09:58:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466620242] [2020-12-22 09:58:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:58:26,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:58:27,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:27,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:58:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093429108] [2020-12-22 09:58:27,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:58:27,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:58:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:58:27,034 INFO L87 Difference]: Start difference. First operand 8808 states and 11712 transitions. Second operand 16 states. [2020-12-22 09:58:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:30,896 INFO L93 Difference]: Finished difference Result 19879 states and 26731 transitions. [2020-12-22 09:58:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:58:30,897 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:58:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:30,952 INFO L225 Difference]: With dead ends: 19879 [2020-12-22 09:58:30,953 INFO L226 Difference]: Without dead ends: 17901 [2020-12-22 09:58:30,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:58:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17901 states. [2020-12-22 09:58:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17901 to 14530. [2020-12-22 09:58:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14530 states. [2020-12-22 09:58:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 19274 transitions. [2020-12-22 09:58:32,261 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 19274 transitions. Word has length 97 [2020-12-22 09:58:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:32,262 INFO L481 AbstractCegarLoop]: Abstraction has 14530 states and 19274 transitions. [2020-12-22 09:58:32,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:58:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 19274 transitions. [2020-12-22 09:58:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:32,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:32,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:58:32,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:58:32,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:32,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752838715] [2020-12-22 09:58:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:32,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752838715] [2020-12-22 09:58:32,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165553740] [2020-12-22 09:58:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:32,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:58:32,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:33,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:58:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:33,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:33,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:58:33,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446009313] [2020-12-22 09:58:33,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:58:33,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:58:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:58:33,517 INFO L87 Difference]: Start difference. First operand 14530 states and 19274 transitions. Second operand 22 states. [2020-12-22 09:58:33,834 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:58:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:38,375 INFO L93 Difference]: Finished difference Result 45331 states and 60340 transitions. [2020-12-22 09:58:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:58:38,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:58:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:38,425 INFO L225 Difference]: With dead ends: 45331 [2020-12-22 09:58:38,426 INFO L226 Difference]: Without dead ends: 38828 [2020-12-22 09:58:38,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:58:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38828 states. [2020-12-22 09:58:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38828 to 27033. [2020-12-22 09:58:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27033 states. [2020-12-22 09:58:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27033 states to 27033 states and 35813 transitions. [2020-12-22 09:58:40,543 INFO L78 Accepts]: Start accepts. Automaton has 27033 states and 35813 transitions. Word has length 98 [2020-12-22 09:58:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:58:40,544 INFO L481 AbstractCegarLoop]: Abstraction has 27033 states and 35813 transitions. [2020-12-22 09:58:40,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:58:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27033 states and 35813 transitions. [2020-12-22 09:58:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:58:40,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:58:40,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:58:40,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:58:40,747 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:58:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:58:40,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:58:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:58:40,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170989198] [2020-12-22 09:58:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:58:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170989198] [2020-12-22 09:58:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974582619] [2020-12-22 09:58:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:58:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:58:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:58:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:58:41,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:58:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:58:41,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:58:41,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:58:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503171635] [2020-12-22 09:58:41,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:58:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:58:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:58:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:58:41,679 INFO L87 Difference]: Start difference. First operand 27033 states and 35813 transitions. Second operand 17 states. [2020-12-22 09:58:49,484 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:59:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:07,019 INFO L93 Difference]: Finished difference Result 221588 states and 293623 transitions. [2020-12-22 09:59:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:59:07,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:59:07,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:07,508 INFO L225 Difference]: With dead ends: 221588 [2020-12-22 09:59:07,509 INFO L226 Difference]: Without dead ends: 202031 [2020-12-22 09:59:07,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:59:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202031 states. [2020-12-22 09:59:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202031 to 117306. [2020-12-22 09:59:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117306 states. [2020-12-22 09:59:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117306 states to 117306 states and 153196 transitions. [2020-12-22 09:59:20,840 INFO L78 Accepts]: Start accepts. Automaton has 117306 states and 153196 transitions. Word has length 98 [2020-12-22 09:59:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:20,841 INFO L481 AbstractCegarLoop]: Abstraction has 117306 states and 153196 transitions. [2020-12-22 09:59:20,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:59:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 117306 states and 153196 transitions. [2020-12-22 09:59:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:20,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:20,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:21,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:59:21,046 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:59:21,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:21,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933971129] [2020-12-22 09:59:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:59:21,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933971129] [2020-12-22 09:59:21,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:21,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:21,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398018685] [2020-12-22 09:59:21,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:21,152 INFO L87 Difference]: Start difference. First operand 117306 states and 153196 transitions. Second operand 6 states. [2020-12-22 09:59:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:32,315 INFO L93 Difference]: Finished difference Result 217751 states and 284977 transitions. [2020-12-22 09:59:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:32,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:32,479 INFO L225 Difference]: With dead ends: 217751 [2020-12-22 09:59:32,480 INFO L226 Difference]: Without dead ends: 107447 [2020-12-22 09:59:32,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107447 states. [2020-12-22 09:59:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107447 to 107447. [2020-12-22 09:59:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107447 states. [2020-12-22 09:59:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107447 states to 107447 states and 139435 transitions. [2020-12-22 09:59:43,678 INFO L78 Accepts]: Start accepts. Automaton has 107447 states and 139435 transitions. Word has length 98 [2020-12-22 09:59:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 107447 states and 139435 transitions. [2020-12-22 09:59:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:59:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 107447 states and 139435 transitions. [2020-12-22 09:59:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:43,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:43,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:43,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:59:43,682 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:59:43,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:43,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241091596] [2020-12-22 09:59:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:59:43,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241091596] [2020-12-22 09:59:43,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:43,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:43,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998204547] [2020-12-22 09:59:43,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:59:43,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:59:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:59:43,993 INFO L87 Difference]: Start difference. First operand 107447 states and 139435 transitions. Second operand 6 states. [2020-12-22 09:59:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:52,868 INFO L93 Difference]: Finished difference Result 180985 states and 234886 transitions. [2020-12-22 09:59:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:59:52,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:59:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:52,975 INFO L225 Difference]: With dead ends: 180985 [2020-12-22 09:59:52,975 INFO L226 Difference]: Without dead ends: 80706 [2020-12-22 09:59:53,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:59:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80706 states. [2020-12-22 10:00:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80706 to 80706. [2020-12-22 10:00:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80706 states. [2020-12-22 10:00:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80706 states to 80706 states and 103363 transitions. [2020-12-22 10:00:01,314 INFO L78 Accepts]: Start accepts. Automaton has 80706 states and 103363 transitions. Word has length 98 [2020-12-22 10:00:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:01,315 INFO L481 AbstractCegarLoop]: Abstraction has 80706 states and 103363 transitions. [2020-12-22 10:00:01,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 80706 states and 103363 transitions. [2020-12-22 10:00:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:00:01,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:01,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:01,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:00:01,318 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:01,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 10:00:01,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:01,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461805075] [2020-12-22 10:00:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 10:00:01,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461805075] [2020-12-22 10:00:01,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:01,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:01,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785475990] [2020-12-22 10:00:01,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:01,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:01,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:01,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:01,396 INFO L87 Difference]: Start difference. First operand 80706 states and 103363 transitions. Second operand 6 states. [2020-12-22 10:00:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:08,457 INFO L93 Difference]: Finished difference Result 136496 states and 175027 transitions. [2020-12-22 10:00:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:08,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:00:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:08,528 INFO L225 Difference]: With dead ends: 136496 [2020-12-22 10:00:08,528 INFO L226 Difference]: Without dead ends: 62676 [2020-12-22 10:00:08,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62676 states. [2020-12-22 10:00:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62676 to 62676. [2020-12-22 10:00:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62676 states. [2020-12-22 10:00:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62676 states to 62676 states and 80057 transitions. [2020-12-22 10:00:15,239 INFO L78 Accepts]: Start accepts. Automaton has 62676 states and 80057 transitions. Word has length 98 [2020-12-22 10:00:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:15,239 INFO L481 AbstractCegarLoop]: Abstraction has 62676 states and 80057 transitions. [2020-12-22 10:00:15,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62676 states and 80057 transitions. [2020-12-22 10:00:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:00:15,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:15,242 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:15,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:00:15,242 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:15,242 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 10:00:15,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:15,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572397166] [2020-12-22 10:00:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:00:15,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572397166] [2020-12-22 10:00:15,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:15,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:15,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028819655] [2020-12-22 10:00:15,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:15,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:15,359 INFO L87 Difference]: Start difference. First operand 62676 states and 80057 transitions. Second operand 6 states. [2020-12-22 10:00:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:20,914 INFO L93 Difference]: Finished difference Result 105730 states and 134960 transitions. [2020-12-22 10:00:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:20,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 10:00:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:20,975 INFO L225 Difference]: With dead ends: 105730 [2020-12-22 10:00:20,975 INFO L226 Difference]: Without dead ends: 49942 [2020-12-22 10:00:21,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:00:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49942 states. [2020-12-22 10:00:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49942 to 49942. [2020-12-22 10:00:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49942 states. [2020-12-22 10:00:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49942 states to 49942 states and 63300 transitions. [2020-12-22 10:00:26,464 INFO L78 Accepts]: Start accepts. Automaton has 49942 states and 63300 transitions. Word has length 99 [2020-12-22 10:00:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:26,464 INFO L481 AbstractCegarLoop]: Abstraction has 49942 states and 63300 transitions. [2020-12-22 10:00:26,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:00:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 49942 states and 63300 transitions. [2020-12-22 10:00:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 10:00:26,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:26,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:26,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 10:00:26,467 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 10:00:26,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:26,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035857572] [2020-12-22 10:00:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:26,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035857572] [2020-12-22 10:00:26,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318701375] [2020-12-22 10:00:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:00:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:00:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:00:27,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:00:27,506 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 10:00:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:00:28,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:00:28,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 10:00:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70475013] [2020-12-22 10:00:28,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:00:28,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:00:28,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:00:28,155 INFO L87 Difference]: Start difference. First operand 49942 states and 63300 transitions. Second operand 20 states. [2020-12-22 10:00:29,103 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 10:00:29,595 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 10:00:30,180 WARN L197 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 10:00:31,011 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 10:00:31,626 WARN L197 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:32,433 WARN L197 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:33,288 WARN L197 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:00:34,034 WARN L197 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 10:00:34,746 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:00:35,412 WARN L197 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 10:00:36,187 WARN L197 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:00:36,904 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:38,040 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:00:38,865 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:00:39,652 WARN L197 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:00:40,812 WARN L197 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:00:44,629 WARN L197 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:00:45,535 WARN L197 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:00:46,508 WARN L197 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:47,021 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:00:48,305 WARN L197 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:00:48,834 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:00:49,326 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:49,889 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:50,637 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:00:51,086 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:52,190 WARN L197 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:00:53,323 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:53,903 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:00:54,394 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:55,565 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:00:56,019 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:00:57,137 WARN L197 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:00:57,647 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:00:58,081 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:01:01,518 WARN L197 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:01:03,272 WARN L197 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:01:04,239 WARN L197 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:01:04,813 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:01:05,341 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:01:06,149 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:01:06,667 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:01:07,312 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:01:07,645 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:01:08,259 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:01:08,663 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 80