/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:47:08,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:47:08,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:47:09,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:47:09,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:47:09,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:47:09,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:47:09,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:47:09,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:47:09,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:47:09,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:47:09,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:47:09,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:47:09,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:47:09,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:47:09,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:47:09,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:47:09,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:47:09,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:47:09,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:47:09,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:47:09,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:47:09,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:47:09,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:47:09,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:47:09,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:47:09,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:47:09,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:47:09,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:47:09,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:47:09,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:47:09,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:47:09,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:47:09,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:47:09,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:47:09,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:47:09,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:47:09,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:47:09,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:47:09,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:47:09,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:47:09,153 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:47:09,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:47:09,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:47:09,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:47:09,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:47:09,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:47:09,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:47:09,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:47:09,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:47:09,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:47:09,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:47:09,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:47:09,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:47:09,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:47:09,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:47:09,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:47:09,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:47:09,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:47:09,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:47:09,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:47:09,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:47:09,550 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:47:09,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:47:09,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc38a6f7/c66400d3f6a2466e987950eda5a9f805/FLAG320d83fd9 [2020-12-22 09:47:10,716 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:47:10,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:47:10,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc38a6f7/c66400d3f6a2466e987950eda5a9f805/FLAG320d83fd9 [2020-12-22 09:47:11,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc38a6f7/c66400d3f6a2466e987950eda5a9f805 [2020-12-22 09:47:11,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:47:11,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:47:11,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:47:11,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:47:11,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:47:11,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:47:11" (1/1) ... [2020-12-22 09:47:11,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@492c3ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:11, skipping insertion in model container [2020-12-22 09:47:11,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:47:11" (1/1) ... [2020-12-22 09:47:11,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:47:11,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:47:11,728 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c[8784,8797] [2020-12-22 09:47:11,800 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c[14096,14109] [2020-12-22 09:47:12,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:47:12,926 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:47:12,993 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c[8784,8797] [2020-12-22 09:47:13,008 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c[14096,14109] [2020-12-22 09:47:13,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:47:13,725 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:47:13,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13 WrapperNode [2020-12-22 09:47:13,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:47:13,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:47:13,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:47:13,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:47:13,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:13,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:47:14,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:47:14,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:47:14,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:47:14,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (1/1) ... [2020-12-22 09:47:14,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:47:14,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:47:14,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:47:14,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:47:14,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (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 09:47:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:47:14,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:47:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:47:14,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:47:20,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:47:20,028 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:47:20,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:47:20 BoogieIcfgContainer [2020-12-22 09:47:20,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:47:20,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:47:20,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:47:20,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:47:20,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:47:11" (1/3) ... [2020-12-22 09:47:20,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241c85ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:47:20, skipping insertion in model container [2020-12-22 09:47:20,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:47:13" (2/3) ... [2020-12-22 09:47:20,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241c85ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:47:20, skipping insertion in model container [2020-12-22 09:47:20,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:47:20" (3/3) ... [2020-12-22 09:47:20,040 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:47:20,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:47:20,052 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:47:20,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:47:20,104 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:47:20,105 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:47:20,105 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:47:20,105 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:47:20,105 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:47:20,105 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:47:20,106 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:47:20,106 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:47:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:47:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:47:20,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:20,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:20,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:47:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608622582] [2020-12-22 09:47:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:20,448 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 09:47:20,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608622582] [2020-12-22 09:47:20,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:20,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:47:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514060876] [2020-12-22 09:47:20,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:47:20,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:47:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:47:20,473 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:47:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:20,561 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:47:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:47:20,563 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:47:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:20,610 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:47:20,611 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:47:20,623 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 09:47:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:47:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:47:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:47:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:47:20,801 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:47:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:20,801 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:47:20,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:47:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:47:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:47:20,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:20,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:20,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:47:20,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:47:20,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:20,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641568278] [2020-12-22 09:47:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:20,971 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 09:47:20,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641568278] [2020-12-22 09:47:20,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:20,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:20,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769215028] [2020-12-22 09:47:20,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:47:20,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:20,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:47:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:47:20,979 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:47:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:21,214 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:47:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:47:21,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:47:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:21,226 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:47:21,226 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:47:21,227 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 09:47:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:47:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:47:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:47:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:47:21,250 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:47:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:21,251 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:47:21,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:47:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:47:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:47:21,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:21,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:21,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:47:21,254 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2085515115, now seen corresponding path program 1 times [2020-12-22 09:47:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:21,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136093281] [2020-12-22 09:47:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:21,434 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 09:47:21,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136093281] [2020-12-22 09:47:21,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:21,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:21,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898982032] [2020-12-22 09:47:21,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:47:21,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:47:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:47:21,437 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 4 states. [2020-12-22 09:47:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:32,175 INFO L93 Difference]: Finished difference Result 3083 states and 5848 transitions. [2020-12-22 09:47:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:47:32,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-22 09:47:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:32,190 INFO L225 Difference]: With dead ends: 3083 [2020-12-22 09:47:32,190 INFO L226 Difference]: Without dead ends: 2330 [2020-12-22 09:47:32,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:47:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2020-12-22 09:47:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2330. [2020-12-22 09:47:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2020-12-22 09:47:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3653 transitions. [2020-12-22 09:47:32,264 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3653 transitions. Word has length 48 [2020-12-22 09:47:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:32,265 INFO L481 AbstractCegarLoop]: Abstraction has 2330 states and 3653 transitions. [2020-12-22 09:47:32,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:47:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3653 transitions. [2020-12-22 09:47:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:47:32,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:32,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:32,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:47:32,270 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:47:32,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:32,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140272715] [2020-12-22 09:47:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:32,445 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 09:47:32,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140272715] [2020-12-22 09:47:32,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:32,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:32,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549497757] [2020-12-22 09:47:32,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:32,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:32,449 INFO L87 Difference]: Start difference. First operand 2330 states and 3653 transitions. Second operand 6 states. [2020-12-22 09:47:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:32,643 INFO L93 Difference]: Finished difference Result 2690 states and 4221 transitions. [2020-12-22 09:47:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:47:32,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:47:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:32,658 INFO L225 Difference]: With dead ends: 2690 [2020-12-22 09:47:32,659 INFO L226 Difference]: Without dead ends: 2645 [2020-12-22 09:47:32,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:47:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2020-12-22 09:47:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2373. [2020-12-22 09:47:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 09:47:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3721 transitions. [2020-12-22 09:47:32,725 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3721 transitions. Word has length 52 [2020-12-22 09:47:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:32,727 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 3721 transitions. [2020-12-22 09:47:32,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3721 transitions. [2020-12-22 09:47:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:47:32,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:32,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:47:32,732 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:47:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258220423] [2020-12-22 09:47:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:32,842 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 09:47:32,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258220423] [2020-12-22 09:47:32,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:32,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:32,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278488093] [2020-12-22 09:47:32,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:32,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:32,846 INFO L87 Difference]: Start difference. First operand 2373 states and 3721 transitions. Second operand 3 states. [2020-12-22 09:47:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:32,912 INFO L93 Difference]: Finished difference Result 2538 states and 3980 transitions. [2020-12-22 09:47:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:32,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:47:32,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:32,928 INFO L225 Difference]: With dead ends: 2538 [2020-12-22 09:47:32,928 INFO L226 Difference]: Without dead ends: 2450 [2020-12-22 09:47:32,930 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 09:47:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2020-12-22 09:47:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2446. [2020-12-22 09:47:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-12-22 09:47:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3833 transitions. [2020-12-22 09:47:32,991 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3833 transitions. Word has length 54 [2020-12-22 09:47:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:32,991 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3833 transitions. [2020-12-22 09:47:32,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3833 transitions. [2020-12-22 09:47:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:47:32,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:32,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:32,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:47:32,994 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:47:32,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:32,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559843171] [2020-12-22 09:47:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:33,200 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 09:47:33,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559843171] [2020-12-22 09:47:33,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:33,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719464486] [2020-12-22 09:47:33,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:33,205 INFO L87 Difference]: Start difference. First operand 2446 states and 3833 transitions. Second operand 6 states. [2020-12-22 09:47:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:33,386 INFO L93 Difference]: Finished difference Result 2609 states and 4085 transitions. [2020-12-22 09:47:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:33,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:47:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:33,402 INFO L225 Difference]: With dead ends: 2609 [2020-12-22 09:47:33,402 INFO L226 Difference]: Without dead ends: 2448 [2020-12-22 09:47:33,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:47:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2020-12-22 09:47:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2446. [2020-12-22 09:47:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-12-22 09:47:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3831 transitions. [2020-12-22 09:47:33,482 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3831 transitions. Word has length 54 [2020-12-22 09:47:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:33,482 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3831 transitions. [2020-12-22 09:47:33,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3831 transitions. [2020-12-22 09:47:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:47:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:33,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:33,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:47:33,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:47:33,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:33,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373272058] [2020-12-22 09:47:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:33,535 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 09:47:33,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373272058] [2020-12-22 09:47:33,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:33,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555418987] [2020-12-22 09:47:33,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:33,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:33,537 INFO L87 Difference]: Start difference. First operand 2446 states and 3831 transitions. Second operand 3 states. [2020-12-22 09:47:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:33,595 INFO L93 Difference]: Finished difference Result 2744 states and 4289 transitions. [2020-12-22 09:47:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:33,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:47:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:33,609 INFO L225 Difference]: With dead ends: 2744 [2020-12-22 09:47:33,609 INFO L226 Difference]: Without dead ends: 2583 [2020-12-22 09:47:33,611 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 09:47:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2020-12-22 09:47:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2581. [2020-12-22 09:47:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2020-12-22 09:47:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4035 transitions. [2020-12-22 09:47:33,688 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4035 transitions. Word has length 54 [2020-12-22 09:47:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:33,688 INFO L481 AbstractCegarLoop]: Abstraction has 2581 states and 4035 transitions. [2020-12-22 09:47:33,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4035 transitions. [2020-12-22 09:47:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:47:33,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:33,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:33,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:47:33,690 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:47:33,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:33,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695872427] [2020-12-22 09:47:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:33,735 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 09:47:33,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695872427] [2020-12-22 09:47:33,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:33,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:33,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981295549] [2020-12-22 09:47:33,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:33,738 INFO L87 Difference]: Start difference. First operand 2581 states and 4035 transitions. Second operand 3 states. [2020-12-22 09:47:33,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:33,813 INFO L93 Difference]: Finished difference Result 3125 states and 4861 transitions. [2020-12-22 09:47:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:33,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:47:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:33,829 INFO L225 Difference]: With dead ends: 3125 [2020-12-22 09:47:33,830 INFO L226 Difference]: Without dead ends: 2829 [2020-12-22 09:47:33,831 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 09:47:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2020-12-22 09:47:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2827. [2020-12-22 09:47:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-12-22 09:47:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 4399 transitions. [2020-12-22 09:47:33,992 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 4399 transitions. Word has length 54 [2020-12-22 09:47:33,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:33,993 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 4399 transitions. [2020-12-22 09:47:33,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 4399 transitions. [2020-12-22 09:47:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:47:33,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:33,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:33,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:47:33,995 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:47:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:34,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181519955] [2020-12-22 09:47:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:34,061 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 09:47:34,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181519955] [2020-12-22 09:47:34,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:34,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:34,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067733723] [2020-12-22 09:47:34,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:34,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:34,066 INFO L87 Difference]: Start difference. First operand 2827 states and 4399 transitions. Second operand 3 states. [2020-12-22 09:47:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:34,168 INFO L93 Difference]: Finished difference Result 3815 states and 5873 transitions. [2020-12-22 09:47:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:34,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:47:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:34,188 INFO L225 Difference]: With dead ends: 3815 [2020-12-22 09:47:34,188 INFO L226 Difference]: Without dead ends: 3273 [2020-12-22 09:47:34,190 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 09:47:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2020-12-22 09:47:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3271. [2020-12-22 09:47:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3271 states. [2020-12-22 09:47:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3271 states to 3271 states and 5039 transitions. [2020-12-22 09:47:34,323 INFO L78 Accepts]: Start accepts. Automaton has 3271 states and 5039 transitions. Word has length 54 [2020-12-22 09:47:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:34,324 INFO L481 AbstractCegarLoop]: Abstraction has 3271 states and 5039 transitions. [2020-12-22 09:47:34,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3271 states and 5039 transitions. [2020-12-22 09:47:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:47:34,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:34,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:34,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:47:34,325 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:47:34,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:34,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576611638] [2020-12-22 09:47:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:34,426 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 09:47:34,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576611638] [2020-12-22 09:47:34,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:34,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230114197] [2020-12-22 09:47:34,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:47:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:47:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:47:34,431 INFO L87 Difference]: Start difference. First operand 3271 states and 5039 transitions. Second operand 5 states. [2020-12-22 09:47:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:34,646 INFO L93 Difference]: Finished difference Result 4025 states and 6124 transitions. [2020-12-22 09:47:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:47:34,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:47:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:34,685 INFO L225 Difference]: With dead ends: 4025 [2020-12-22 09:47:34,685 INFO L226 Difference]: Without dead ends: 4023 [2020-12-22 09:47:34,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:47:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2020-12-22 09:47:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3319. [2020-12-22 09:47:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3319 states. [2020-12-22 09:47:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 5079 transitions. [2020-12-22 09:47:34,844 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 5079 transitions. Word has length 55 [2020-12-22 09:47:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:34,844 INFO L481 AbstractCegarLoop]: Abstraction has 3319 states and 5079 transitions. [2020-12-22 09:47:34,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:47:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 5079 transitions. [2020-12-22 09:47:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:47:34,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:34,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:34,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:47:34,846 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:47:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:34,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183348184] [2020-12-22 09:47:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:34,894 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 09:47:34,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183348184] [2020-12-22 09:47:34,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:34,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735250207] [2020-12-22 09:47:34,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:34,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:34,898 INFO L87 Difference]: Start difference. First operand 3319 states and 5079 transitions. Second operand 3 states. [2020-12-22 09:47:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:35,062 INFO L93 Difference]: Finished difference Result 4382 states and 6637 transitions. [2020-12-22 09:47:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:35,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:47:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:35,073 INFO L225 Difference]: With dead ends: 4382 [2020-12-22 09:47:35,074 INFO L226 Difference]: Without dead ends: 3787 [2020-12-22 09:47:35,077 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 09:47:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2020-12-22 09:47:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2020-12-22 09:47:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:47:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:47:35,278 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 56 [2020-12-22 09:47:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:35,278 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:47:35,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:47:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:47:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:35,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:47:35,287 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:47:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:35,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012653092] [2020-12-22 09:47:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:47:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012653092] [2020-12-22 09:47:35,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:35,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487312996] [2020-12-22 09:47:35,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:35,393 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:47:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:36,044 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:47:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:36,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:47:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:36,068 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:47:36,068 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:47:36,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:47:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:47:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:47:36,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:47:36,561 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:47:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:36,561 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:47:36,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:47:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:47:36,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:36,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:36,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:47:36,564 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:47:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:36,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594727858] [2020-12-22 09:47:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:47:36,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594727858] [2020-12-22 09:47:36,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:36,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:36,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961737743] [2020-12-22 09:47:36,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:36,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:36,712 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:47:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:37,484 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:47:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:37,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:47:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:37,510 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:47:37,510 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:47:37,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:47:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:47:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:47:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:47:38,044 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:47:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:38,044 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:47:38,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:47:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:47:38,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:38,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:38,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:47:38,047 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:47:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:38,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636317040] [2020-12-22 09:47:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:47:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636317040] [2020-12-22 09:47:38,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:38,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:38,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582087518] [2020-12-22 09:47:38,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:38,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:38,151 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:47:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:39,014 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:47:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:39,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:47:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:39,044 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:47:39,044 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:47:39,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:47:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:47:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:47:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:47:39,708 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:47:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:39,708 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:47:39,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:47:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:47:39,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:39,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:39,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:47:39,712 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:47:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:39,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095042240] [2020-12-22 09:47:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095042240] [2020-12-22 09:47:39,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:39,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:39,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188229812] [2020-12-22 09:47:39,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:39,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:39,777 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:47:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:40,222 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:47:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:40,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:47:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:40,239 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:47:40,239 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:47:40,250 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 09:47:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:47:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:47:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:47:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:47:40,677 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:47:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:40,678 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:47:40,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:47:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:47:40,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:40,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:40,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:47:40,681 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:47:40,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:40,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544521209] [2020-12-22 09:47:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:47:40,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544521209] [2020-12-22 09:47:40,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:40,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:47:40,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013449913] [2020-12-22 09:47:40,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:40,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:40,792 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:47:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:41,500 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:47:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:41,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:47:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:41,526 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:47:41,526 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:47:41,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:47:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:47:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:47:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:47:42,153 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:47:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:42,153 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:47:42,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:47:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:42,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:42,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:42,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:47:42,157 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:47:42,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:42,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280773332] [2020-12-22 09:47:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280773332] [2020-12-22 09:47:42,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:42,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:42,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865938897] [2020-12-22 09:47:42,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:42,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:42,237 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:47:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:42,499 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:47:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:42,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:42,509 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:47:42,510 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:47:42,518 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 09:47:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:47:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:47:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:47:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:47:42,789 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:47:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:42,789 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:47:42,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:47:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:42,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:42,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:42,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:47:42,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:47:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:42,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146571295] [2020-12-22 09:47:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:42,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146571295] [2020-12-22 09:47:42,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:42,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:42,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632371024] [2020-12-22 09:47:42,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:42,876 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:47:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:43,023 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:47:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:43,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:43,031 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:47:43,031 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:47:43,035 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 09:47:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:47:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:47:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:47:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:47:43,190 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:47:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:43,190 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:47:43,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:47:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:43,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:43,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:43,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:47:43,193 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:47:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:43,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023342125] [2020-12-22 09:47:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:43,247 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 09:47:43,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023342125] [2020-12-22 09:47:43,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:43,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:43,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809466947] [2020-12-22 09:47:43,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:43,250 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:47:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:43,335 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:47:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:43,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:43,342 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:47:43,343 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:47:43,345 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 09:47:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:47:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:47:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:47:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:47:43,442 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:47:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:43,442 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:47:43,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:47:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:43,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:43,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:43,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:47:43,444 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:43,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:47:43,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:43,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951981265] [2020-12-22 09:47:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:43,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951981265] [2020-12-22 09:47:43,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978328575] [2020-12-22 09:47:43,710 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 09:47:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:47:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:47:44,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:44,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:47:44,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978215042] [2020-12-22 09:47:44,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:47:44,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:47:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:47:44,270 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:47:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:46,068 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:47:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:47:46,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:47:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:46,081 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:47:46,082 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:47:46,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:47:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:47:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:47:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:47:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:47:46,496 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:47:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:46,497 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:47:46,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:47:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:47:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:46,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:46,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:46,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:46,711 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:46,712 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:47:46,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:46,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658926902] [2020-12-22 09:47:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:46,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658926902] [2020-12-22 09:47:46,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255876303] [2020-12-22 09:47:46,950 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 09:47:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:47:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:47,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:47,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:47,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:47:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049549250] [2020-12-22 09:47:47,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:47:47,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:47:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:47:47,692 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:47:47,819 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:47:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:50,911 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:47:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:47:50,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:47:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:50,938 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:47:50,938 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:47:50,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:47:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:47:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:47:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:47:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:47:51,833 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:47:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:51,834 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:47:51,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:47:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:47:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:51,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:51,836 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:52,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:52,051 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:47:52,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:52,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211216126] [2020-12-22 09:47:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:52,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211216126] [2020-12-22 09:47:52,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613068337] [2020-12-22 09:47:52,300 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 09:47:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:52,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:47:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:52,574 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:52,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:52,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:47:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973159053] [2020-12-22 09:47:52,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:47:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:47:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:47:52,867 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:47:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:56,776 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:47:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:47:56,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:47:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:56,835 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:47:56,835 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:47:56,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:47:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:47:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:47:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:47:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:47:58,892 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:47:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:58,892 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:47:58,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:47:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:47:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:58,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:58,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:59,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:47:59,110 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:47:59,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:59,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709809446] [2020-12-22 09:47:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:47:59,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709809446] [2020-12-22 09:47:59,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:59,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:59,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079162352] [2020-12-22 09:47:59,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:59,191 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:48:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:00,769 INFO L93 Difference]: Finished difference Result 34115 states and 44420 transitions. [2020-12-22 09:48:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:00,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:48:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:00,805 INFO L225 Difference]: With dead ends: 34115 [2020-12-22 09:48:00,806 INFO L226 Difference]: Without dead ends: 16828 [2020-12-22 09:48:00,826 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 09:48:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2020-12-22 09:48:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 16828. [2020-12-22 09:48:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16828 states. [2020-12-22 09:48:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16828 states to 16828 states and 21936 transitions. [2020-12-22 09:48:02,467 INFO L78 Accepts]: Start accepts. Automaton has 16828 states and 21936 transitions. Word has length 82 [2020-12-22 09:48:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:02,467 INFO L481 AbstractCegarLoop]: Abstraction has 16828 states and 21936 transitions. [2020-12-22 09:48:02,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 16828 states and 21936 transitions. [2020-12-22 09:48:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:02,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:02,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:02,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:48:02,470 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:48:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111546639] [2020-12-22 09:48:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:48:02,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111546639] [2020-12-22 09:48:02,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:02,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834715510] [2020-12-22 09:48:02,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:02,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:02,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:02,542 INFO L87 Difference]: Start difference. First operand 16828 states and 21936 transitions. Second operand 6 states. [2020-12-22 09:48:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:03,747 INFO L93 Difference]: Finished difference Result 27573 states and 35601 transitions. [2020-12-22 09:48:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:03,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:48:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:03,768 INFO L225 Difference]: With dead ends: 27573 [2020-12-22 09:48:03,768 INFO L226 Difference]: Without dead ends: 13155 [2020-12-22 09:48:03,784 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 09:48:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2020-12-22 09:48:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 13155. [2020-12-22 09:48:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13155 states. [2020-12-22 09:48:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13155 states to 13155 states and 17158 transitions. [2020-12-22 09:48:05,071 INFO L78 Accepts]: Start accepts. Automaton has 13155 states and 17158 transitions. Word has length 82 [2020-12-22 09:48:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:05,071 INFO L481 AbstractCegarLoop]: Abstraction has 13155 states and 17158 transitions. [2020-12-22 09:48:05,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13155 states and 17158 transitions. [2020-12-22 09:48:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:05,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:05,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:05,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:48:05,074 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:48:05,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:05,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099888515] [2020-12-22 09:48:05,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:48:05,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099888515] [2020-12-22 09:48:05,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:05,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:05,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131118478] [2020-12-22 09:48:05,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:05,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:05,142 INFO L87 Difference]: Start difference. First operand 13155 states and 17158 transitions. Second operand 6 states. [2020-12-22 09:48:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:06,262 INFO L93 Difference]: Finished difference Result 21510 states and 27719 transitions. [2020-12-22 09:48:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:06,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:48:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:06,273 INFO L225 Difference]: With dead ends: 21510 [2020-12-22 09:48:06,273 INFO L226 Difference]: Without dead ends: 10683 [2020-12-22 09:48:06,278 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 09:48:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2020-12-22 09:48:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 10683. [2020-12-22 09:48:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10683 states. [2020-12-22 09:48:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 14039 transitions. [2020-12-22 09:48:07,265 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 14039 transitions. Word has length 82 [2020-12-22 09:48:07,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:07,265 INFO L481 AbstractCegarLoop]: Abstraction has 10683 states and 14039 transitions. [2020-12-22 09:48:07,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:07,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 14039 transitions. [2020-12-22 09:48:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:07,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:07,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:07,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:48:07,268 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:48:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:07,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99259368] [2020-12-22 09:48:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:07,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99259368] [2020-12-22 09:48:07,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283133188] [2020-12-22 09:48:07,483 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 09:48:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:48:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:07,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:08,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:08,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:08,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258606629] [2020-12-22 09:48:08,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:08,018 INFO L87 Difference]: Start difference. First operand 10683 states and 14039 transitions. Second operand 17 states. [2020-12-22 09:48:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:13,436 INFO L93 Difference]: Finished difference Result 43485 states and 54479 transitions. [2020-12-22 09:48:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:13,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:48:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:13,482 INFO L225 Difference]: With dead ends: 43485 [2020-12-22 09:48:13,483 INFO L226 Difference]: Without dead ends: 36464 [2020-12-22 09:48:13,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36464 states. [2020-12-22 09:48:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36464 to 23602. [2020-12-22 09:48:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23602 states. [2020-12-22 09:48:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23602 states to 23602 states and 30088 transitions. [2020-12-22 09:48:15,990 INFO L78 Accepts]: Start accepts. Automaton has 23602 states and 30088 transitions. Word has length 83 [2020-12-22 09:48:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:15,990 INFO L481 AbstractCegarLoop]: Abstraction has 23602 states and 30088 transitions. [2020-12-22 09:48:15,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:48:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 23602 states and 30088 transitions. [2020-12-22 09:48:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:15,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:15,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:16,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:16,208 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:48:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:16,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553118838] [2020-12-22 09:48:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:48:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553118838] [2020-12-22 09:48:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046999524] [2020-12-22 09:48:16,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:16,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:16,283 INFO L87 Difference]: Start difference. First operand 23602 states and 30088 transitions. Second operand 6 states. [2020-12-22 09:48:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:18,672 INFO L93 Difference]: Finished difference Result 39695 states and 50044 transitions. [2020-12-22 09:48:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:18,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:48:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:18,692 INFO L225 Difference]: With dead ends: 39695 [2020-12-22 09:48:18,692 INFO L226 Difference]: Without dead ends: 18577 [2020-12-22 09:48:18,706 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 09:48:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18577 states. [2020-12-22 09:48:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18577 to 18577. [2020-12-22 09:48:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18577 states. [2020-12-22 09:48:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18577 states to 18577 states and 23485 transitions. [2020-12-22 09:48:20,659 INFO L78 Accepts]: Start accepts. Automaton has 18577 states and 23485 transitions. Word has length 83 [2020-12-22 09:48:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:20,660 INFO L481 AbstractCegarLoop]: Abstraction has 18577 states and 23485 transitions. [2020-12-22 09:48:20,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18577 states and 23485 transitions. [2020-12-22 09:48:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:48:20,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:20,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:20,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:48:20,663 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:20,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:48:20,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:20,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485098827] [2020-12-22 09:48:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:22,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485098827] [2020-12-22 09:48:22,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256307161] [2020-12-22 09:48:22,341 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 09:48:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:48:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:23,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:23,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:23,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:48:23,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15717630] [2020-12-22 09:48:23,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:48:23,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:48:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:48:23,839 INFO L87 Difference]: Start difference. First operand 18577 states and 23485 transitions. Second operand 40 states. [2020-12-22 09:48:24,320 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:48:25,463 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:48:25,743 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-22 09:48:26,062 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:48:26,330 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:48:26,692 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:48:27,089 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:48:27,601 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:48:28,068 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:48:28,636 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:48:29,201 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:48:29,558 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:48:29,930 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:48:30,188 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:48:30,549 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:48:30,828 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:48:31,215 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:48:31,495 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:48:31,702 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:48:32,005 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:48:32,260 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:48:32,802 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:48:33,281 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:48:33,454 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:48:33,675 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:48:34,497 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:48:34,770 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:48:35,035 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:48:35,411 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:48:35,922 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:48:36,183 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:48:36,393 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:48:36,862 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:48:37,086 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:48:37,733 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:48:38,107 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:48:38,325 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:48:38,536 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:48:38,792 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:48:39,600 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:48:40,806 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:48:41,157 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:48:41,406 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:48:41,612 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 09:48:41,919 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:48:42,200 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:48:42,564 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:48:42,809 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:48:43,054 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:48:43,233 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:43,437 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:48:43,645 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:48:43,992 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:48:44,177 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:48:44,619 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:48:44,913 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:48:45,261 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:48:45,456 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:48:45,694 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:48:45,965 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:48:46,204 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:48:46,868 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:48:47,082 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:48:47,414 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:48:48,290 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:48:48,512 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:48:51,453 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:48:51,774 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:48:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:52,999 INFO L93 Difference]: Finished difference Result 31159 states and 39315 transitions. [2020-12-22 09:48:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:48:53,000 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:48:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:53,030 INFO L225 Difference]: With dead ends: 31159 [2020-12-22 09:48:53,030 INFO L226 Difference]: Without dead ends: 25008 [2020-12-22 09:48:53,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:48:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25008 states. [2020-12-22 09:48:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25008 to 16775. [2020-12-22 09:48:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16775 states. [2020-12-22 09:48:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 21346 transitions. [2020-12-22 09:48:54,967 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 21346 transitions. Word has length 84 [2020-12-22 09:48:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:54,967 INFO L481 AbstractCegarLoop]: Abstraction has 16775 states and 21346 transitions. [2020-12-22 09:48:54,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:48:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 21346 transitions. [2020-12-22 09:48:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:48:54,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:54,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:55,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:48:55,175 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:48:55,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:55,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776618527] [2020-12-22 09:48:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:55,601 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:55,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776618527] [2020-12-22 09:48:55,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482806948] [2020-12-22 09:48:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:48:56,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:56,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:56,742 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:48:56,930 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:48:57,432 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:48:57,503 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 09:48:57,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:57,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:48:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099041191] [2020-12-22 09:48:57,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:48:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:48:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:48:57,505 INFO L87 Difference]: Start difference. First operand 16775 states and 21346 transitions. Second operand 23 states. [2020-12-22 09:48:57,684 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:48:58,295 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:58,521 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:58,747 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:48:59,182 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:48:59,445 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:48:59,767 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:49:00,237 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:00,698 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:01,356 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:01,747 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:49:02,209 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:49:02,561 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:49:03,050 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:49:03,254 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:49:03,563 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:49:03,841 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:49:04,283 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:49:04,880 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:49:05,111 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:49:05,702 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:49:06,542 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:49:06,773 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:49:07,068 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:49:07,476 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:49:08,093 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:49:08,507 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:49:09,138 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:49:09,430 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:49:09,634 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:49:10,234 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:49:10,533 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:49:10,779 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:49:10,953 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:49:11,241 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:49:11,602 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:49:11,821 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:49:12,077 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:49:12,433 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:49:12,703 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:49:13,260 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:49:13,478 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:49:13,716 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:49:14,320 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:49:14,660 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:49:15,271 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:49:15,624 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:49:16,143 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:49:16,601 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:49:16,794 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:49:17,151 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:49:17,429 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:49:17,757 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:49:19,356 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:49:19,941 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:49:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:21,611 INFO L93 Difference]: Finished difference Result 30891 states and 39471 transitions. [2020-12-22 09:49:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:49:21,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:49:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:21,633 INFO L225 Difference]: With dead ends: 30891 [2020-12-22 09:49:21,633 INFO L226 Difference]: Without dead ends: 22210 [2020-12-22 09:49:21,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:49:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2020-12-22 09:49:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 12522. [2020-12-22 09:49:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12522 states. [2020-12-22 09:49:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 16204 transitions. [2020-12-22 09:49:23,150 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 16204 transitions. Word has length 84 [2020-12-22 09:49:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:23,151 INFO L481 AbstractCegarLoop]: Abstraction has 12522 states and 16204 transitions. [2020-12-22 09:49:23,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:49:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 16204 transitions. [2020-12-22 09:49:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:49:23,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:23,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:23,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:49:23,356 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:49:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:23,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434665083] [2020-12-22 09:49:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,885 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:49:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:24,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434665083] [2020-12-22 09:49:24,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703130575] [2020-12-22 09:49:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:24,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:24,543 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2020-12-22 09:49:24,837 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:25,136 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:49:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:25,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:49:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368948853] [2020-12-22 09:49:25,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:49:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:25,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:49:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:49:25,672 INFO L87 Difference]: Start difference. First operand 12522 states and 16204 transitions. Second operand 24 states. [2020-12-22 09:49:26,319 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:49:26,633 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:49:26,977 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:49:27,234 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:49:27,728 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:49:28,065 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:49:28,559 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:49:29,090 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:49:29,311 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:49:29,686 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:49:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:31,855 INFO L93 Difference]: Finished difference Result 19352 states and 24464 transitions. [2020-12-22 09:49:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:31,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:49:31,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:31,870 INFO L225 Difference]: With dead ends: 19352 [2020-12-22 09:49:31,870 INFO L226 Difference]: Without dead ends: 14457 [2020-12-22 09:49:31,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:49:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14457 states. [2020-12-22 09:49:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14457 to 10430. [2020-12-22 09:49:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10430 states. [2020-12-22 09:49:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 13673 transitions. [2020-12-22 09:49:33,217 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 13673 transitions. Word has length 86 [2020-12-22 09:49:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:33,217 INFO L481 AbstractCegarLoop]: Abstraction has 10430 states and 13673 transitions. [2020-12-22 09:49:33,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:49:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 13673 transitions. [2020-12-22 09:49:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:49:33,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:33,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:33,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:33,420 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1054813317, now seen corresponding path program 1 times [2020-12-22 09:49:33,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:33,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054859438] [2020-12-22 09:49:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054859438] [2020-12-22 09:49:33,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:33,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:49:33,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978293279] [2020-12-22 09:49:33,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:49:33,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:49:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:49:33,581 INFO L87 Difference]: Start difference. First operand 10430 states and 13673 transitions. Second operand 4 states. [2020-12-22 09:49:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:46,707 INFO L93 Difference]: Finished difference Result 14226 states and 20037 transitions. [2020-12-22 09:49:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:49:46,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 09:49:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:46,718 INFO L225 Difference]: With dead ends: 14226 [2020-12-22 09:49:46,718 INFO L226 Difference]: Without dead ends: 11934 [2020-12-22 09:49:46,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:49:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11934 states. [2020-12-22 09:49:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11934 to 11932. [2020-12-22 09:49:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11932 states. [2020-12-22 09:49:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 15261 transitions. [2020-12-22 09:49:47,952 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 15261 transitions. Word has length 119 [2020-12-22 09:49:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:47,953 INFO L481 AbstractCegarLoop]: Abstraction has 11932 states and 15261 transitions. [2020-12-22 09:49:47,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:49:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 15261 transitions. [2020-12-22 09:49:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:49:47,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:47,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:47,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:49:47,956 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:49:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:47,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091589645] [2020-12-22 09:49:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:48,354 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-22 09:49:48,523 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:49:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:48,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091589645] [2020-12-22 09:49:48,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245782454] [2020-12-22 09:49:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:49:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:49:49,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:49,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:49:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259541327] [2020-12-22 09:49:49,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:49:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:49:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:49:49,305 INFO L87 Difference]: Start difference. First operand 11932 states and 15261 transitions. Second operand 15 states. [2020-12-22 09:49:49,452 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:49:49,989 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:49:50,243 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:49:50,411 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:50,766 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:51,060 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:51,406 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:51,596 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:51,789 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:52,072 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:52,251 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:49:52,440 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:53,190 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:49:53,791 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:49:54,006 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:54,225 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:49:54,601 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:54,964 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:49:55,641 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:49:56,251 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:49:56,434 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:56,611 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:49:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:57,074 INFO L93 Difference]: Finished difference Result 23813 states and 29927 transitions. [2020-12-22 09:49:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:49:57,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:49:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:57,092 INFO L225 Difference]: With dead ends: 23813 [2020-12-22 09:49:57,092 INFO L226 Difference]: Without dead ends: 16359 [2020-12-22 09:49:57,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:49:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16359 states. [2020-12-22 09:49:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16359 to 16243. [2020-12-22 09:49:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16243 states. [2020-12-22 09:49:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16243 states to 16243 states and 19982 transitions. [2020-12-22 09:49:59,231 INFO L78 Accepts]: Start accepts. Automaton has 16243 states and 19982 transitions. Word has length 135 [2020-12-22 09:49:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:59,232 INFO L481 AbstractCegarLoop]: Abstraction has 16243 states and 19982 transitions. [2020-12-22 09:49:59,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:49:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 16243 states and 19982 transitions. [2020-12-22 09:49:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:49:59,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:59,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:59,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 09:49:59,437 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:49:59,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:59,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192693231] [2020-12-22 09:49:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:59,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192693231] [2020-12-22 09:49:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731719338] [2020-12-22 09:49:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:50:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:00,463 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:50:01,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:50:01,103 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:01,335 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:01,994 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:03,033 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:04,327 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:05,790 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:07,383 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:08,178 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:08,843 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:09,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:50:10,846 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:50:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:30,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:30,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:50:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124004989] [2020-12-22 09:50:30,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:50:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:50:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:50:30,601 INFO L87 Difference]: Start difference. First operand 16243 states and 19982 transitions. Second operand 22 states. [2020-12-22 09:50:31,024 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 09:50:31,761 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 09:50:32,399 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 09:50:33,023 WARN L197 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-12-22 09:50:34,183 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-12-22 09:50:37,170 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-12-22 09:50:39,869 WARN L197 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 09:50:40,700 WARN L197 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-12-22 09:50:41,442 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-12-22 09:50:42,088 WARN L197 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-22 09:50:42,744 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 09:50:43,996 WARN L197 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112