/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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:04,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:04,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:04,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:04,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:04,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:04,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:04,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:04,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:04,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:04,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:04,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:04,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:04,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:04,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:04,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:04,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:04,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:04,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:04,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:04,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:04,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:04,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:04,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:04,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:41:04,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:04,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:04,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:04,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:04,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:04,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:04,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:04,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:04,986 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:04,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:04,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:04,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:04,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:04,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:04,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:04,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:04,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:04,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:04,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:04,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:04,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:04,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:04,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:04,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:04,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:04,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:04,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:04,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:04,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:04,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:05,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:05,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:05,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:05,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:05,419 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:05,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:41:05,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71229bb5f/6a4b86d04c6044678e1934c54c21e6de/FLAG44f25cd97 [2020-12-22 09:41:06,498 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:06,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:41:06,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71229bb5f/6a4b86d04c6044678e1934c54c21e6de/FLAG44f25cd97 [2020-12-22 09:41:06,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71229bb5f/6a4b86d04c6044678e1934c54c21e6de [2020-12-22 09:41:06,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:06,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:06,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:06,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:06,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:06,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:06" (1/1) ... [2020-12-22 09:41:06,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265635e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:06, skipping insertion in model container [2020-12-22 09:41:06,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:06" (1/1) ... [2020-12-22 09:41:07,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:07,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:07,490 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6582,6595] [2020-12-22 09:41:07,578 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13275,13288] [2020-12-22 09:41:08,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:08,582 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:08,646 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[6582,6595] [2020-12-22 09:41:08,664 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.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[13275,13288] [2020-12-22 09:41:09,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:09,442 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:09,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09 WrapperNode [2020-12-22 09:41:09,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:09,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:09,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:09,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:09,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:09,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:09,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:09,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:09,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:10,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:10,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:10,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:10,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:10,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (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 09:41:10,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:10,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:10,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:10,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:15,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:15,512 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:15,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:15 BoogieIcfgContainer [2020-12-22 09:41:15,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:15,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:15,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:15,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:15,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:06" (1/3) ... [2020-12-22 09:41:15,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5f97aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:15, skipping insertion in model container [2020-12-22 09:41:15,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09" (2/3) ... [2020-12-22 09:41:15,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5f97aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:15, skipping insertion in model container [2020-12-22 09:41:15,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:15" (3/3) ... [2020-12-22 09:41:15,531 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:41:15,537 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:15,543 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:15,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:15,600 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:15,600 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:15,600 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:15,600 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:15,600 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:15,601 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:15,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:15,601 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states. [2020-12-22 09:41:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:15,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:15,645 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] [2020-12-22 09:41:15,645 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:41:15,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:15,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102953467] [2020-12-22 09:41:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:15,976 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 09:41:15,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102953467] [2020-12-22 09:41:15,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:15,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:15,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669452046] [2020-12-22 09:41:15,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:16,005 INFO L87 Difference]: Start difference. First operand 877 states. Second operand 2 states. [2020-12-22 09:41:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:16,118 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2020-12-22 09:41:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:16,120 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:41:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:16,144 INFO L225 Difference]: With dead ends: 1730 [2020-12-22 09:41:16,144 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:16,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2020-12-22 09:41:16,267 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2020-12-22 09:41:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:16,268 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2020-12-22 09:41:16,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2020-12-22 09:41:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:41:16,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:16,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:16,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:16,271 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:41:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:16,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500424151] [2020-12-22 09:41:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,398 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 09:41:16,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500424151] [2020-12-22 09:41:16,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:16,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:16,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828247088] [2020-12-22 09:41:16,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:16,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:16,407 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand 5 states. [2020-12-22 09:41:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:16,533 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2020-12-22 09:41:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:16,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:41:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:16,542 INFO L225 Difference]: With dead ends: 850 [2020-12-22 09:41:16,542 INFO L226 Difference]: Without dead ends: 811 [2020-12-22 09:41:16,546 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 09:41:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-12-22 09:41:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2020-12-22 09:41:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 811 states. [2020-12-22 09:41:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2020-12-22 09:41:16,596 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2020-12-22 09:41:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:16,597 INFO L481 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2020-12-22 09:41:16,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2020-12-22 09:41:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:16,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:16,605 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] [2020-12-22 09:41:16,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:16,606 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:16,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:41:16,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:16,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601985079] [2020-12-22 09:41:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:16,756 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 09:41:16,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601985079] [2020-12-22 09:41:16,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:16,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280417378] [2020-12-22 09:41:16,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:16,768 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand 3 states. [2020-12-22 09:41:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:16,806 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2020-12-22 09:41:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:16,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:41:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:16,813 INFO L225 Difference]: With dead ends: 875 [2020-12-22 09:41:16,814 INFO L226 Difference]: Without dead ends: 840 [2020-12-22 09:41:16,816 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 09:41:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-22 09:41:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2020-12-22 09:41:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-12-22 09:41:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2020-12-22 09:41:16,854 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2020-12-22 09:41:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:16,855 INFO L481 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2020-12-22 09:41:16,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2020-12-22 09:41:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:41:16,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:16,860 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] [2020-12-22 09:41:16,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:16,860 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:41:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:16,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600321323] [2020-12-22 09:41:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,002 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 09:41:17,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600321323] [2020-12-22 09:41:17,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538760378] [2020-12-22 09:41:17,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:17,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:17,006 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:41:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:17,167 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2020-12-22 09:41:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:17,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:41:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:17,175 INFO L225 Difference]: With dead ends: 1210 [2020-12-22 09:41:17,176 INFO L226 Difference]: Without dead ends: 1148 [2020-12-22 09:41:17,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-22 09:41:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2020-12-22 09:41:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 09:41:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2020-12-22 09:41:17,217 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2020-12-22 09:41:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,218 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2020-12-22 09:41:17,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2020-12-22 09:41:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:17,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,220 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] [2020-12-22 09:41:17,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:17,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:41:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816982887] [2020-12-22 09:41:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,302 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 09:41:17,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816982887] [2020-12-22 09:41:17,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:17,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790439932] [2020-12-22 09:41:17,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:17,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:17,305 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand 3 states. [2020-12-22 09:41:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:17,350 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2020-12-22 09:41:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:17,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:17,357 INFO L225 Difference]: With dead ends: 1079 [2020-12-22 09:41:17,357 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:17,358 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 09:41:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:17,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2020-12-22 09:41:17,453 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2020-12-22 09:41:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,455 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2020-12-22 09:41:17,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2020-12-22 09:41:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:17,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,456 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] [2020-12-22 09:41:17,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:17,457 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:41:17,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814198213] [2020-12-22 09:41:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,602 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 09:41:17,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814198213] [2020-12-22 09:41:17,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:17,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698115757] [2020-12-22 09:41:17,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:17,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:17,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:17,604 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand 5 states. [2020-12-22 09:41:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:17,712 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2020-12-22 09:41:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:17,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:41:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:17,720 INFO L225 Difference]: With dead ends: 1134 [2020-12-22 09:41:17,720 INFO L226 Difference]: Without dead ends: 957 [2020-12-22 09:41:17,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2020-12-22 09:41:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2020-12-22 09:41:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2020-12-22 09:41:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2020-12-22 09:41:17,754 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2020-12-22 09:41:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,754 INFO L481 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2020-12-22 09:41:17,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2020-12-22 09:41:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:17,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,756 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] [2020-12-22 09:41:17,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:17,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:41:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492992353] [2020-12-22 09:41:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,835 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 09:41:17,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492992353] [2020-12-22 09:41:17,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:17,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471039408] [2020-12-22 09:41:17,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:17,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:17,839 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand 3 states. [2020-12-22 09:41:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:17,884 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2020-12-22 09:41:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:17,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:17,894 INFO L225 Difference]: With dead ends: 1273 [2020-12-22 09:41:17,894 INFO L226 Difference]: Without dead ends: 1096 [2020-12-22 09:41:17,896 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 09:41:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2020-12-22 09:41:17,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2020-12-22 09:41:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-12-22 09:41:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2020-12-22 09:41:17,935 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2020-12-22 09:41:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:17,936 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2020-12-22 09:41:17,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2020-12-22 09:41:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:41:17,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:17,937 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] [2020-12-22 09:41:17,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:17,938 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:17,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:41:17,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:17,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595706122] [2020-12-22 09:41:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:17,979 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 09:41:17,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595706122] [2020-12-22 09:41:17,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:17,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445940700] [2020-12-22 09:41:17,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:17,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:17,983 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand 3 states. [2020-12-22 09:41:18,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:18,036 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2020-12-22 09:41:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:18,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:41:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:18,045 INFO L225 Difference]: With dead ends: 1654 [2020-12-22 09:41:18,045 INFO L226 Difference]: Without dead ends: 1338 [2020-12-22 09:41:18,047 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 09:41:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2020-12-22 09:41:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2020-12-22 09:41:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1336 states. [2020-12-22 09:41:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2020-12-22 09:41:18,103 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2020-12-22 09:41:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:18,105 INFO L481 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2020-12-22 09:41:18,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2020-12-22 09:41:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:41:18,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:18,106 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] [2020-12-22 09:41:18,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:18,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:41:18,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:18,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186970246] [2020-12-22 09:41:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:18,243 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 09:41:18,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186970246] [2020-12-22 09:41:18,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:18,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:41:18,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90593178] [2020-12-22 09:41:18,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:41:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:41:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:41:18,248 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand 8 states. [2020-12-22 09:41:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:18,480 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2020-12-22 09:41:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:41:18,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:41:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:18,491 INFO L225 Difference]: With dead ends: 1843 [2020-12-22 09:41:18,492 INFO L226 Difference]: Without dead ends: 1841 [2020-12-22 09:41:18,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:41:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2020-12-22 09:41:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2020-12-22 09:41:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-12-22 09:41:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2020-12-22 09:41:18,573 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2020-12-22 09:41:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:18,573 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2020-12-22 09:41:18,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:41:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2020-12-22 09:41:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:41:18,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:18,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:18,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:18,575 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2111682747, now seen corresponding path program 1 times [2020-12-22 09:41:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:18,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946273453] [2020-12-22 09:41:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:18,710 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 09:41:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946273453] [2020-12-22 09:41:18,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:18,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:18,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483744656] [2020-12-22 09:41:18,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:41:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:41:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:41:18,713 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand 4 states. [2020-12-22 09:41:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,789 INFO L93 Difference]: Finished difference Result 3639 states and 6637 transitions. [2020-12-22 09:41:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:41:28,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:41:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,806 INFO L225 Difference]: With dead ends: 3639 [2020-12-22 09:41:28,807 INFO L226 Difference]: Without dead ends: 2886 [2020-12-22 09:41:28,809 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 09:41:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2020-12-22 09:41:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2886. [2020-12-22 09:41:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2886 states. [2020-12-22 09:41:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 4304 transitions. [2020-12-22 09:41:28,970 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 4304 transitions. Word has length 60 [2020-12-22 09:41:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:28,971 INFO L481 AbstractCegarLoop]: Abstraction has 2886 states and 4304 transitions. [2020-12-22 09:41:28,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:41:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 4304 transitions. [2020-12-22 09:41:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:28,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:28,972 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] [2020-12-22 09:41:28,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:28,973 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2020-12-22 09:41:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:28,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924631020] [2020-12-22 09:41:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:41:29,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924631020] [2020-12-22 09:41:29,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:29,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405948072] [2020-12-22 09:41:29,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:29,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:29,044 INFO L87 Difference]: Start difference. First operand 2886 states and 4304 transitions. Second operand 5 states. [2020-12-22 09:41:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,283 INFO L93 Difference]: Finished difference Result 4838 states and 7076 transitions. [2020-12-22 09:41:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:29,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,304 INFO L225 Difference]: With dead ends: 4838 [2020-12-22 09:41:29,305 INFO L226 Difference]: Without dead ends: 4232 [2020-12-22 09:41:29,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2020-12-22 09:41:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3490. [2020-12-22 09:41:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3490 states. [2020-12-22 09:41:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 5156 transitions. [2020-12-22 09:41:29,473 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 5156 transitions. Word has length 63 [2020-12-22 09:41:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,474 INFO L481 AbstractCegarLoop]: Abstraction has 3490 states and 5156 transitions. [2020-12-22 09:41:29,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 5156 transitions. [2020-12-22 09:41:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:29,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,476 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] [2020-12-22 09:41:29,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:29,476 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2020-12-22 09:41:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171834704] [2020-12-22 09:41:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:41:29,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171834704] [2020-12-22 09:41:29,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:29,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036526911] [2020-12-22 09:41:29,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:29,549 INFO L87 Difference]: Start difference. First operand 3490 states and 5156 transitions. Second operand 5 states. [2020-12-22 09:41:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,832 INFO L93 Difference]: Finished difference Result 5442 states and 7928 transitions. [2020-12-22 09:41:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:29,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,857 INFO L225 Difference]: With dead ends: 5442 [2020-12-22 09:41:29,857 INFO L226 Difference]: Without dead ends: 4836 [2020-12-22 09:41:29,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2020-12-22 09:41:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4398. [2020-12-22 09:41:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4398 states. [2020-12-22 09:41:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 6424 transitions. [2020-12-22 09:41:30,111 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 6424 transitions. Word has length 63 [2020-12-22 09:41:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:30,111 INFO L481 AbstractCegarLoop]: Abstraction has 4398 states and 6424 transitions. [2020-12-22 09:41:30,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 6424 transitions. [2020-12-22 09:41:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:30,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:30,113 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] [2020-12-22 09:41:30,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:30,114 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2020-12-22 09:41:30,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:30,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270929012] [2020-12-22 09:41:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270929012] [2020-12-22 09:41:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:30,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870962870] [2020-12-22 09:41:30,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:30,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:30,181 INFO L87 Difference]: Start difference. First operand 4398 states and 6424 transitions. Second operand 5 states. [2020-12-22 09:41:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:30,488 INFO L93 Difference]: Finished difference Result 5702 states and 8300 transitions. [2020-12-22 09:41:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:41:30,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:41:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:30,520 INFO L225 Difference]: With dead ends: 5702 [2020-12-22 09:41:30,520 INFO L226 Difference]: Without dead ends: 5268 [2020-12-22 09:41:30,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:41:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2020-12-22 09:41:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4830. [2020-12-22 09:41:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4830 states. [2020-12-22 09:41:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 7040 transitions. [2020-12-22 09:41:30,865 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 7040 transitions. Word has length 63 [2020-12-22 09:41:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:30,865 INFO L481 AbstractCegarLoop]: Abstraction has 4830 states and 7040 transitions. [2020-12-22 09:41:30,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 7040 transitions. [2020-12-22 09:41:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:30,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:30,867 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:41:30,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:30,868 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2020-12-22 09:41:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:30,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880967462] [2020-12-22 09:41:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880967462] [2020-12-22 09:41:30,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85725354] [2020-12-22 09:41:30,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:30,917 INFO L87 Difference]: Start difference. First operand 4830 states and 7040 transitions. Second operand 3 states. [2020-12-22 09:41:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:31,128 INFO L93 Difference]: Finished difference Result 7382 states and 10642 transitions. [2020-12-22 09:41:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:31,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:31,140 INFO L225 Difference]: With dead ends: 7382 [2020-12-22 09:41:31,140 INFO L226 Difference]: Without dead ends: 4832 [2020-12-22 09:41:31,146 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 09:41:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4832 states. [2020-12-22 09:41:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4832 to 4830. [2020-12-22 09:41:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4830 states. [2020-12-22 09:41:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 6990 transitions. [2020-12-22 09:41:31,387 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 6990 transitions. Word has length 64 [2020-12-22 09:41:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:31,387 INFO L481 AbstractCegarLoop]: Abstraction has 4830 states and 6990 transitions. [2020-12-22 09:41:31,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 6990 transitions. [2020-12-22 09:41:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:31,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:31,389 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:31,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:31,389 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2020-12-22 09:41:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:31,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607525989] [2020-12-22 09:41:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607525989] [2020-12-22 09:41:31,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:31,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735227216] [2020-12-22 09:41:31,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:31,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:31,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:31,439 INFO L87 Difference]: Start difference. First operand 4830 states and 6990 transitions. Second operand 3 states. [2020-12-22 09:41:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:31,560 INFO L93 Difference]: Finished difference Result 6108 states and 8767 transitions. [2020-12-22 09:41:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:31,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:41:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:31,570 INFO L225 Difference]: With dead ends: 6108 [2020-12-22 09:41:31,570 INFO L226 Difference]: Without dead ends: 3558 [2020-12-22 09:41:31,574 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 09:41:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2020-12-22 09:41:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3556. [2020-12-22 09:41:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3556 states. [2020-12-22 09:41:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 5190 transitions. [2020-12-22 09:41:31,709 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 5190 transitions. Word has length 64 [2020-12-22 09:41:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:31,709 INFO L481 AbstractCegarLoop]: Abstraction has 3556 states and 5190 transitions. [2020-12-22 09:41:31,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 5190 transitions. [2020-12-22 09:41:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:41:31,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:31,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:31,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:31,711 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2020-12-22 09:41:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:31,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772505833] [2020-12-22 09:41:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:31,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772505833] [2020-12-22 09:41:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601753758] [2020-12-22 09:41:31,909 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 09:41:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:41:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:41:32,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:32,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:41:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899763397] [2020-12-22 09:41:32,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:41:32,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:41:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:41:32,345 INFO L87 Difference]: Start difference. First operand 3556 states and 5190 transitions. Second operand 12 states. [2020-12-22 09:41:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:35,141 INFO L93 Difference]: Finished difference Result 9947 states and 13894 transitions. [2020-12-22 09:41:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:35,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 09:41:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:35,162 INFO L225 Difference]: With dead ends: 9947 [2020-12-22 09:41:35,162 INFO L226 Difference]: Without dead ends: 8973 [2020-12-22 09:41:35,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 09:41:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8973 states. [2020-12-22 09:41:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8973 to 6690. [2020-12-22 09:41:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6690 states. [2020-12-22 09:41:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 9377 transitions. [2020-12-22 09:41:35,706 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 9377 transitions. Word has length 64 [2020-12-22 09:41:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:35,707 INFO L481 AbstractCegarLoop]: Abstraction has 6690 states and 9377 transitions. [2020-12-22 09:41:35,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:41:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 9377 transitions. [2020-12-22 09:41:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:35,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:35,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:35,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:41:35,923 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2020-12-22 09:41:35,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:35,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526662085] [2020-12-22 09:41:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526662085] [2020-12-22 09:41:36,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741266614] [2020-12-22 09:41:36,169 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 09:41:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:36,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:36,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:36,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:41:36,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950967140] [2020-12-22 09:41:36,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:41:36,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:41:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:41:36,906 INFO L87 Difference]: Start difference. First operand 6690 states and 9377 transitions. Second operand 17 states. [2020-12-22 09:41:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:41,642 INFO L93 Difference]: Finished difference Result 28970 states and 39115 transitions. [2020-12-22 09:41:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:41:41,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 09:41:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:41,690 INFO L225 Difference]: With dead ends: 28970 [2020-12-22 09:41:41,690 INFO L226 Difference]: Without dead ends: 24560 [2020-12-22 09:41:41,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:41:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24560 states. [2020-12-22 09:41:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24560 to 11970. [2020-12-22 09:41:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11970 states. [2020-12-22 09:41:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11970 states to 11970 states and 16285 transitions. [2020-12-22 09:41:42,718 INFO L78 Accepts]: Start accepts. Automaton has 11970 states and 16285 transitions. Word has length 65 [2020-12-22 09:41:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:42,718 INFO L481 AbstractCegarLoop]: Abstraction has 11970 states and 16285 transitions. [2020-12-22 09:41:42,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:41:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11970 states and 16285 transitions. [2020-12-22 09:41:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:42,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:42,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:42,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:41:42,938 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2020-12-22 09:41:42,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:42,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271590608] [2020-12-22 09:41:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271590608] [2020-12-22 09:41:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248164311] [2020-12-22 09:41:43,299 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 09:41:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:41:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:43,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:43,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:43,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:41:43,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216983396] [2020-12-22 09:41:43,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:43,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:43,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:43,833 INFO L87 Difference]: Start difference. First operand 11970 states and 16285 transitions. Second operand 18 states. [2020-12-22 09:41:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:48,616 INFO L93 Difference]: Finished difference Result 53066 states and 69923 transitions. [2020-12-22 09:41:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:41:48,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2020-12-22 09:41:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:48,712 INFO L225 Difference]: With dead ends: 53066 [2020-12-22 09:41:48,713 INFO L226 Difference]: Without dead ends: 43376 [2020-12-22 09:41:48,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:41:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43376 states. [2020-12-22 09:41:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43376 to 28724. [2020-12-22 09:41:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28724 states. [2020-12-22 09:41:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28724 states to 28724 states and 38031 transitions. [2020-12-22 09:41:51,763 INFO L78 Accepts]: Start accepts. Automaton has 28724 states and 38031 transitions. Word has length 65 [2020-12-22 09:41:51,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:51,764 INFO L481 AbstractCegarLoop]: Abstraction has 28724 states and 38031 transitions. [2020-12-22 09:41:51,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:41:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28724 states and 38031 transitions. [2020-12-22 09:41:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:51,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:51,767 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] [2020-12-22 09:41:51,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:41:51,974 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2020-12-22 09:41:51,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:51,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313688970] [2020-12-22 09:41:51,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313688970] [2020-12-22 09:41:52,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:52,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:52,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922236860] [2020-12-22 09:41:52,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:52,059 INFO L87 Difference]: Start difference. First operand 28724 states and 38031 transitions. Second operand 3 states. [2020-12-22 09:41:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:53,422 INFO L93 Difference]: Finished difference Result 40182 states and 53023 transitions. [2020-12-22 09:41:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:53,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:41:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:53,453 INFO L225 Difference]: With dead ends: 40182 [2020-12-22 09:41:53,454 INFO L226 Difference]: Without dead ends: 13738 [2020-12-22 09:41:53,489 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 09:41:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13738 states. [2020-12-22 09:41:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13738 to 12861. [2020-12-22 09:41:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12861 states. [2020-12-22 09:41:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17055 transitions. [2020-12-22 09:41:54,775 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17055 transitions. Word has length 65 [2020-12-22 09:41:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:54,776 INFO L481 AbstractCegarLoop]: Abstraction has 12861 states and 17055 transitions. [2020-12-22 09:41:54,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17055 transitions. [2020-12-22 09:41:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:54,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:54,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:54,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:41:54,779 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2020-12-22 09:41:54,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:54,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232768461] [2020-12-22 09:41:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:41:54,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232768461] [2020-12-22 09:41:54,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:54,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:54,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338953879] [2020-12-22 09:41:54,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:54,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:54,905 INFO L87 Difference]: Start difference. First operand 12861 states and 17055 transitions. Second operand 6 states. [2020-12-22 09:41:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:56,267 INFO L93 Difference]: Finished difference Result 21652 states and 28428 transitions. [2020-12-22 09:41:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:56,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:56,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:56,294 INFO L225 Difference]: With dead ends: 21652 [2020-12-22 09:41:56,294 INFO L226 Difference]: Without dead ends: 11144 [2020-12-22 09:41:56,307 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 09:41:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2020-12-22 09:41:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 11144. [2020-12-22 09:41:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-12-22 09:41:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 14618 transitions. [2020-12-22 09:41:57,460 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 14618 transitions. Word has length 65 [2020-12-22 09:41:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:57,461 INFO L481 AbstractCegarLoop]: Abstraction has 11144 states and 14618 transitions. [2020-12-22 09:41:57,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 14618 transitions. [2020-12-22 09:41:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:57,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:57,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:57,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:41:57,463 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:57,464 INFO L82 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2020-12-22 09:41:57,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:57,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859729984] [2020-12-22 09:41:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:41:57,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859729984] [2020-12-22 09:41:57,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:57,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:57,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589599193] [2020-12-22 09:41:57,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:57,532 INFO L87 Difference]: Start difference. First operand 11144 states and 14618 transitions. Second operand 6 states. [2020-12-22 09:41:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:58,242 INFO L93 Difference]: Finished difference Result 17701 states and 22934 transitions. [2020-12-22 09:41:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:58,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:58,259 INFO L225 Difference]: With dead ends: 17701 [2020-12-22 09:41:58,259 INFO L226 Difference]: Without dead ends: 8948 [2020-12-22 09:41:58,268 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 09:41:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8948 states. [2020-12-22 09:41:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8948 to 8948. [2020-12-22 09:41:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8948 states. [2020-12-22 09:41:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8948 states to 8948 states and 11706 transitions. [2020-12-22 09:41:59,221 INFO L78 Accepts]: Start accepts. Automaton has 8948 states and 11706 transitions. Word has length 65 [2020-12-22 09:41:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:59,221 INFO L481 AbstractCegarLoop]: Abstraction has 8948 states and 11706 transitions. [2020-12-22 09:41:59,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8948 states and 11706 transitions. [2020-12-22 09:41:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:41:59,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:59,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:59,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:41:59,223 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:59,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2020-12-22 09:41:59,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:59,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73448562] [2020-12-22 09:41:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:41:59,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73448562] [2020-12-22 09:41:59,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:59,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:59,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037962637] [2020-12-22 09:41:59,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:59,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:59,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:59,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:59,291 INFO L87 Difference]: Start difference. First operand 8948 states and 11706 transitions. Second operand 6 states. [2020-12-22 09:41:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:59,886 INFO L93 Difference]: Finished difference Result 14114 states and 18179 transitions. [2020-12-22 09:41:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:59,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 09:41:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:59,902 INFO L225 Difference]: With dead ends: 14114 [2020-12-22 09:41:59,902 INFO L226 Difference]: Without dead ends: 7481 [2020-12-22 09:41:59,909 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 09:41:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2020-12-22 09:42:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 7481. [2020-12-22 09:42:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7481 states. [2020-12-22 09:42:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 9837 transitions. [2020-12-22 09:42:00,486 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 9837 transitions. Word has length 65 [2020-12-22 09:42:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:00,486 INFO L481 AbstractCegarLoop]: Abstraction has 7481 states and 9837 transitions. [2020-12-22 09:42:00,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:42:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 9837 transitions. [2020-12-22 09:42:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:42:00,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:00,488 INFO L422 BasicCegarLoop]: trace histogram [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 09:42:00,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:42:00,489 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2020-12-22 09:42:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:00,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694220353] [2020-12-22 09:42:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694220353] [2020-12-22 09:42:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812045003] [2020-12-22 09:42:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:01,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 09:42:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:02,203 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:02,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:42:02,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:42:02,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:42:02,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:42:03,000 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:42:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:03,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:03,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2020-12-22 09:42:03,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148565189] [2020-12-22 09:42:03,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:42:03,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:03,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:42:03,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:42:03,323 INFO L87 Difference]: Start difference. First operand 7481 states and 9837 transitions. Second operand 39 states. [2020-12-22 09:42:03,585 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-22 09:42:04,680 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-12-22 09:42:04,944 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-12-22 09:42:05,191 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:42:05,490 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-12-22 09:42:05,778 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 09:42:06,031 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:06,279 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 09:42:06,493 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 09:42:06,737 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:42:10,447 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-22 09:42:11,366 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-12-22 09:42:11,650 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:42:11,855 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 09:42:12,412 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-22 09:42:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:13,696 INFO L93 Difference]: Finished difference Result 11074 states and 14348 transitions. [2020-12-22 09:42:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 09:42:13,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 66 [2020-12-22 09:42:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:13,707 INFO L225 Difference]: With dead ends: 11074 [2020-12-22 09:42:13,707 INFO L226 Difference]: Without dead ends: 9204 [2020-12-22 09:42:13,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1370, Invalid=7560, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 09:42:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2020-12-22 09:42:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 7370. [2020-12-22 09:42:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7370 states. [2020-12-22 09:42:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7370 states to 7370 states and 9735 transitions. [2020-12-22 09:42:14,280 INFO L78 Accepts]: Start accepts. Automaton has 7370 states and 9735 transitions. Word has length 66 [2020-12-22 09:42:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:14,280 INFO L481 AbstractCegarLoop]: Abstraction has 7370 states and 9735 transitions. [2020-12-22 09:42:14,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:42:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7370 states and 9735 transitions. [2020-12-22 09:42:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:42:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:14,282 INFO L422 BasicCegarLoop]: trace histogram [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 09:42:14,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:14,496 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2020-12-22 09:42:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:14,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260292637] [2020-12-22 09:42:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:42:15,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260292637] [2020-12-22 09:42:15,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227678195] [2020-12-22 09:42:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:42:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 09:42:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:17,293 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:42:17,313 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:42:17,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:17,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:42:17,888 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46