/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:38:34,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:38:34,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:38:34,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:38:34,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:38:34,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:38:34,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:38:34,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:38:34,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:38:34,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:38:34,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:38:34,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:38:34,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:38:34,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:38:34,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:38:34,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:38:34,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:38:34,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:38:34,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:38:34,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:38:34,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:38:34,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:38:34,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:38:34,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:38:34,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:38:34,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:38:34,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:38:34,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:38:34,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:38:35,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:38:35,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:38:35,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:38:35,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:38:35,011 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:38:35,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:38:35,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:38:35,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:38:35,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:38:35,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:38:35,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:38:35,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:38:35,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:38:35,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:38:35,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:38:35,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:38:35,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:38:35,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:38:35,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:38:35,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:38:35,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:38:35,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:38:35,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:38:35,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:38:35,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:38:35,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:38:35,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:38:35,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:38:35,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:38:35,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:38:35,509 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:38:35,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:38:35,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf24d772/0a84de9712ed46859ae668fc1f443467/FLAG10aa68eaf [2020-12-22 09:38:36,784 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:38:36,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:38:36,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf24d772/0a84de9712ed46859ae668fc1f443467/FLAG10aa68eaf [2020-12-22 09:38:36,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf24d772/0a84de9712ed46859ae668fc1f443467 [2020-12-22 09:38:36,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:38:36,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:38:36,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:38:36,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:38:36,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:38:36,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:36" (1/1) ... [2020-12-22 09:38:36,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b12e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:36, skipping insertion in model container [2020-12-22 09:38:36,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:38:36" (1/1) ... [2020-12-22 09:38:36,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:38:37,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:38:37,395 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[6508,6521] [2020-12-22 09:38:37,431 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[9082,9095] [2020-12-22 09:38:38,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:38:38,521 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:38:38,588 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[6508,6521] [2020-12-22 09:38:38,597 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c[9082,9095] [2020-12-22 09:38:39,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:38:39,400 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:38:39,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39 WrapperNode [2020-12-22 09:38:39,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:38:39,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:38:39,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:38:39,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:38:39,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:39,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:39,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:38:39,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:38:39,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:38:39,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:38:39,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:39,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:39,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:39,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:40,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:40,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:40,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (1/1) ... [2020-12-22 09:38:40,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:38:40,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:38:40,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:38:40,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:38:40,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (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 09:38:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:38:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:38:40,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:38:40,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:38:46,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:38:46,597 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:38:46,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:46 BoogieIcfgContainer [2020-12-22 09:38:46,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:38:46,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:38:46,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:38:46,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:38:46,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:38:36" (1/3) ... [2020-12-22 09:38:46,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e84d7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:46, skipping insertion in model container [2020-12-22 09:38:46,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:38:39" (2/3) ... [2020-12-22 09:38:46,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e84d7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:38:46, skipping insertion in model container [2020-12-22 09:38:46,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:38:46" (3/3) ... [2020-12-22 09:38:46,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label06.c [2020-12-22 09:38:46,619 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:38:46,626 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:38:46,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:38:46,684 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:38:46,684 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:38:46,684 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:38:46,684 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:38:46,685 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:38:46,685 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:38:46,685 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:38:46,685 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:38:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:38:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 09:38:46,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:46,737 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] [2020-12-22 09:38:46,737 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash 495923605, now seen corresponding path program 1 times [2020-12-22 09:38:46,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:46,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177710418] [2020-12-22 09:38:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:47,169 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 09:38:47,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177710418] [2020-12-22 09:38:47,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:47,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:38:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230908000] [2020-12-22 09:38:47,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:47,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:47,199 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 3 states. [2020-12-22 09:38:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:53,883 INFO L93 Difference]: Finished difference Result 2489 states and 4796 transitions. [2020-12-22 09:38:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:53,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 09:38:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:53,923 INFO L225 Difference]: With dead ends: 2489 [2020-12-22 09:38:53,924 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:38:53,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:38:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:38:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:38:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2874 transitions. [2020-12-22 09:38:54,069 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2874 transitions. Word has length 24 [2020-12-22 09:38:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:54,069 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2874 transitions. [2020-12-22 09:38:54,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2874 transitions. [2020-12-22 09:38:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:38:54,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:54,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:54,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:38:54,073 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:38:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:54,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142979147] [2020-12-22 09:38:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:54,202 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 09:38:54,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142979147] [2020-12-22 09:38:54,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:54,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779216518] [2020-12-22 09:38:54,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:54,207 INFO L87 Difference]: Start difference. First operand 1564 states and 2874 transitions. Second operand 5 states. [2020-12-22 09:38:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:54,317 INFO L93 Difference]: Finished difference Result 1605 states and 2936 transitions. [2020-12-22 09:38:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:54,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:38:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:54,330 INFO L225 Difference]: With dead ends: 1605 [2020-12-22 09:38:54,331 INFO L226 Difference]: Without dead ends: 1564 [2020-12-22 09:38:54,333 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 09:38:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2020-12-22 09:38:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2020-12-22 09:38:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2020-12-22 09:38:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2858 transitions. [2020-12-22 09:38:54,382 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2858 transitions. Word has length 26 [2020-12-22 09:38:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:54,383 INFO L481 AbstractCegarLoop]: Abstraction has 1564 states and 2858 transitions. [2020-12-22 09:38:54,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2858 transitions. [2020-12-22 09:38:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:54,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:54,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:54,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:38:54,387 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:38:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:54,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633205785] [2020-12-22 09:38:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:54,530 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 09:38:54,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633205785] [2020-12-22 09:38:54,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:54,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:54,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829883986] [2020-12-22 09:38:54,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:54,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:54,537 INFO L87 Difference]: Start difference. First operand 1564 states and 2858 transitions. Second operand 3 states. [2020-12-22 09:38:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:54,582 INFO L93 Difference]: Finished difference Result 1632 states and 2964 transitions. [2020-12-22 09:38:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:54,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:38:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:54,595 INFO L225 Difference]: With dead ends: 1632 [2020-12-22 09:38:54,597 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:38:54,599 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 09:38:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:38:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1593. [2020-12-22 09:38:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2020-12-22 09:38:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 2904 transitions. [2020-12-22 09:38:54,653 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 2904 transitions. Word has length 41 [2020-12-22 09:38:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:54,655 INFO L481 AbstractCegarLoop]: Abstraction has 1593 states and 2904 transitions. [2020-12-22 09:38:54,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 2904 transitions. [2020-12-22 09:38:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:54,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:54,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:54,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:38:54,661 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:38:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:54,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419721460] [2020-12-22 09:38:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:54,770 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 09:38:54,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419721460] [2020-12-22 09:38:54,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:54,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:54,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4859410] [2020-12-22 09:38:54,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:54,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:54,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:54,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:54,774 INFO L87 Difference]: Start difference. First operand 1593 states and 2904 transitions. Second operand 3 states. [2020-12-22 09:38:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:54,817 INFO L93 Difference]: Finished difference Result 1713 states and 3092 transitions. [2020-12-22 09:38:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:54,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:38:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:54,828 INFO L225 Difference]: With dead ends: 1713 [2020-12-22 09:38:54,828 INFO L226 Difference]: Without dead ends: 1647 [2020-12-22 09:38:54,830 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 09:38:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2020-12-22 09:38:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2020-12-22 09:38:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-12-22 09:38:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2985 transitions. [2020-12-22 09:38:54,885 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2985 transitions. Word has length 41 [2020-12-22 09:38:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:54,885 INFO L481 AbstractCegarLoop]: Abstraction has 1645 states and 2985 transitions. [2020-12-22 09:38:54,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2985 transitions. [2020-12-22 09:38:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:38:54,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:54,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:54,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:38:54,890 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:38:54,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:54,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49444920] [2020-12-22 09:38:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:54,980 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 09:38:54,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49444920] [2020-12-22 09:38:54,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:54,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:54,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463801983] [2020-12-22 09:38:54,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:54,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:54,984 INFO L87 Difference]: Start difference. First operand 1645 states and 2985 transitions. Second operand 5 states. [2020-12-22 09:38:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:55,141 INFO L93 Difference]: Finished difference Result 2353 states and 4095 transitions. [2020-12-22 09:38:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:38:55,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:38:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:55,155 INFO L225 Difference]: With dead ends: 2353 [2020-12-22 09:38:55,155 INFO L226 Difference]: Without dead ends: 2235 [2020-12-22 09:38:55,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:38:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-12-22 09:38:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1761. [2020-12-22 09:38:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 09:38:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3161 transitions. [2020-12-22 09:38:55,215 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3161 transitions. Word has length 41 [2020-12-22 09:38:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:55,216 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 3161 transitions. [2020-12-22 09:38:55,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3161 transitions. [2020-12-22 09:38:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:38:55,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:55,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:55,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:38:55,218 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:38:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:55,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549769693] [2020-12-22 09:38:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:55,267 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 09:38:55,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549769693] [2020-12-22 09:38:55,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:55,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206812497] [2020-12-22 09:38:55,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:55,269 INFO L87 Difference]: Start difference. First operand 1761 states and 3161 transitions. Second operand 3 states. [2020-12-22 09:38:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:55,332 INFO L93 Difference]: Finished difference Result 2185 states and 3807 transitions. [2020-12-22 09:38:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:55,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:38:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:55,343 INFO L225 Difference]: With dead ends: 2185 [2020-12-22 09:38:55,344 INFO L226 Difference]: Without dead ends: 1951 [2020-12-22 09:38:55,345 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 09:38:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2020-12-22 09:38:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1941. [2020-12-22 09:38:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:38:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3417 transitions. [2020-12-22 09:38:55,408 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3417 transitions. Word has length 43 [2020-12-22 09:38:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:55,409 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3417 transitions. [2020-12-22 09:38:55,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3417 transitions. [2020-12-22 09:38:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:38:55,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:55,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:55,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:38:55,410 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:38:55,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:55,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569357173] [2020-12-22 09:38:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:55,574 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 09:38:55,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569357173] [2020-12-22 09:38:55,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:55,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:55,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525538768] [2020-12-22 09:38:55,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:55,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:55,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:55,578 INFO L87 Difference]: Start difference. First operand 1941 states and 3417 transitions. Second operand 5 states. [2020-12-22 09:38:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:55,726 INFO L93 Difference]: Finished difference Result 2357 states and 4035 transitions. [2020-12-22 09:38:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:55,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:38:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:55,739 INFO L225 Difference]: With dead ends: 2357 [2020-12-22 09:38:55,739 INFO L226 Difference]: Without dead ends: 1943 [2020-12-22 09:38:55,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-12-22 09:38:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1941. [2020-12-22 09:38:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-12-22 09:38:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3409 transitions. [2020-12-22 09:38:55,813 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3409 transitions. Word has length 43 [2020-12-22 09:38:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:55,813 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 3409 transitions. [2020-12-22 09:38:55,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3409 transitions. [2020-12-22 09:38:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:38:55,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:55,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:55,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:38:55,816 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:38:55,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:55,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305008528] [2020-12-22 09:38:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:55,952 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 09:38:55,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305008528] [2020-12-22 09:38:55,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:55,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:38:55,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439280123] [2020-12-22 09:38:55,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:38:55,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:38:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:38:55,956 INFO L87 Difference]: Start difference. First operand 1941 states and 3409 transitions. Second operand 8 states. [2020-12-22 09:38:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:56,196 INFO L93 Difference]: Finished difference Result 2267 states and 3873 transitions. [2020-12-22 09:38:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:38:56,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:38:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:56,211 INFO L225 Difference]: With dead ends: 2267 [2020-12-22 09:38:56,211 INFO L226 Difference]: Without dead ends: 2265 [2020-12-22 09:38:56,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:38:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-12-22 09:38:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1965. [2020-12-22 09:38:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-12-22 09:38:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3429 transitions. [2020-12-22 09:38:56,293 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3429 transitions. Word has length 44 [2020-12-22 09:38:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:56,293 INFO L481 AbstractCegarLoop]: Abstraction has 1965 states and 3429 transitions. [2020-12-22 09:38:56,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:38:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3429 transitions. [2020-12-22 09:38:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:38:56,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:56,294 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] [2020-12-22 09:38:56,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:38:56,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:56,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:38:56,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:56,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094032218] [2020-12-22 09:38:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:56,369 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 09:38:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094032218] [2020-12-22 09:38:56,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:56,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:56,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788483018] [2020-12-22 09:38:56,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:56,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:56,373 INFO L87 Difference]: Start difference. First operand 1965 states and 3429 transitions. Second operand 3 states. [2020-12-22 09:38:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:56,449 INFO L93 Difference]: Finished difference Result 2420 states and 4091 transitions. [2020-12-22 09:38:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:56,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:38:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:56,462 INFO L225 Difference]: With dead ends: 2420 [2020-12-22 09:38:56,462 INFO L226 Difference]: Without dead ends: 2161 [2020-12-22 09:38:56,464 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 09:38:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-12-22 09:38:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2159. [2020-12-22 09:38:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:38:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3699 transitions. [2020-12-22 09:38:56,575 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3699 transitions. Word has length 45 [2020-12-22 09:38:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:56,576 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3699 transitions. [2020-12-22 09:38:56,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3699 transitions. [2020-12-22 09:38:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:38:56,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:56,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:56,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:38:56,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:38:56,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:56,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353745512] [2020-12-22 09:38:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:38:56,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353745512] [2020-12-22 09:38:56,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:56,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:56,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235302031] [2020-12-22 09:38:56,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:56,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:56,695 INFO L87 Difference]: Start difference. First operand 2159 states and 3699 transitions. Second operand 5 states. [2020-12-22 09:38:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:56,939 INFO L93 Difference]: Finished difference Result 4187 states and 6575 transitions. [2020-12-22 09:38:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:56,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:38:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:56,957 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:38:56,957 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:38:56,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:38:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:38:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:38:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:38:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4583 transitions. [2020-12-22 09:38:57,117 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4583 transitions. Word has length 63 [2020-12-22 09:38:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:57,118 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4583 transitions. [2020-12-22 09:38:57,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4583 transitions. [2020-12-22 09:38:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:38:57,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:57,119 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:57,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:38:57,120 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:38:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:57,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665895620] [2020-12-22 09:38:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:38:57,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665895620] [2020-12-22 09:38:57,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:57,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623852391] [2020-12-22 09:38:57,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:57,224 INFO L87 Difference]: Start difference. First operand 2787 states and 4583 transitions. Second operand 5 states. [2020-12-22 09:38:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:57,539 INFO L93 Difference]: Finished difference Result 4815 states and 7459 transitions. [2020-12-22 09:38:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:57,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:38:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:57,578 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:38:57,579 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:38:57,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:38:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:38:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:38:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:38:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5899 transitions. [2020-12-22 09:38:57,823 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5899 transitions. Word has length 63 [2020-12-22 09:38:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:57,823 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5899 transitions. [2020-12-22 09:38:57,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5899 transitions. [2020-12-22 09:38:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:38:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:57,825 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] [2020-12-22 09:38:57,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:38:57,825 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:38:57,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:57,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135710710] [2020-12-22 09:38:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:57,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135710710] [2020-12-22 09:38:57,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:57,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:38:57,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759461094] [2020-12-22 09:38:57,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:57,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:57,896 INFO L87 Difference]: Start difference. First operand 3731 states and 5899 transitions. Second operand 3 states. [2020-12-22 09:38:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:58,172 INFO L93 Difference]: Finished difference Result 5324 states and 8166 transitions. [2020-12-22 09:38:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:58,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:38:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:58,181 INFO L225 Difference]: With dead ends: 5324 [2020-12-22 09:38:58,181 INFO L226 Difference]: Without dead ends: 3122 [2020-12-22 09:38:58,186 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 09:38:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2020-12-22 09:38:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3120. [2020-12-22 09:38:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 09:38:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5039 transitions. [2020-12-22 09:38:58,373 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5039 transitions. Word has length 65 [2020-12-22 09:38:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:58,373 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 5039 transitions. [2020-12-22 09:38:58,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5039 transitions. [2020-12-22 09:38:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:38:58,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:58,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:58,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:38:58,375 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:38:58,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:58,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809027948] [2020-12-22 09:38:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:38:58,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809027948] [2020-12-22 09:38:58,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:58,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330509456] [2020-12-22 09:38:58,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:38:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:38:58,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:38:58,443 INFO L87 Difference]: Start difference. First operand 3120 states and 5039 transitions. Second operand 5 states. [2020-12-22 09:38:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:58,742 INFO L93 Difference]: Finished difference Result 4472 states and 6963 transitions. [2020-12-22 09:38:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:38:58,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:38:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:58,753 INFO L225 Difference]: With dead ends: 4472 [2020-12-22 09:38:58,754 INFO L226 Difference]: Without dead ends: 4022 [2020-12-22 09:38:58,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:38:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2020-12-22 09:38:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3568. [2020-12-22 09:38:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3568 states. [2020-12-22 09:38:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 5671 transitions. [2020-12-22 09:38:58,969 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 5671 transitions. Word has length 65 [2020-12-22 09:38:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:58,970 INFO L481 AbstractCegarLoop]: Abstraction has 3568 states and 5671 transitions. [2020-12-22 09:38:58,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:38:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 5671 transitions. [2020-12-22 09:38:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:58,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:58,979 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] [2020-12-22 09:38:58,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:38:58,980 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:38:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:58,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406522393] [2020-12-22 09:38:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:59,244 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 09:38:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406522393] [2020-12-22 09:38:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045585003] [2020-12-22 09:38:59,245 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 09:38:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:38:59,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:38:59,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:59,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:38:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534919512] [2020-12-22 09:38:59,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:38:59,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:59,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:38:59,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:38:59,675 INFO L87 Difference]: Start difference. First operand 3568 states and 5671 transitions. Second operand 12 states. [2020-12-22 09:39:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:02,903 INFO L93 Difference]: Finished difference Result 12862 states and 18427 transitions. [2020-12-22 09:39:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:39:02,904 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:39:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:02,930 INFO L225 Difference]: With dead ends: 12862 [2020-12-22 09:39:02,931 INFO L226 Difference]: Without dead ends: 10844 [2020-12-22 09:39:02,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:39:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10844 states. [2020-12-22 09:39:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10844 to 7580. [2020-12-22 09:39:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7580 states. [2020-12-22 09:39:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7580 states to 7580 states and 10948 transitions. [2020-12-22 09:39:03,869 INFO L78 Accepts]: Start accepts. Automaton has 7580 states and 10948 transitions. Word has length 66 [2020-12-22 09:39:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:03,870 INFO L481 AbstractCegarLoop]: Abstraction has 7580 states and 10948 transitions. [2020-12-22 09:39:03,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:39:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7580 states and 10948 transitions. [2020-12-22 09:39:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:03,872 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] [2020-12-22 09:39:04,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 09:39:04,087 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:39:04,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:04,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702596251] [2020-12-22 09:39:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:04,364 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 09:39:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702596251] [2020-12-22 09:39:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788897931] [2020-12-22 09:39:04,365 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 09:39:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:39:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:04,645 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:04,967 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 09:39:04,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:04,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:39:04,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673134365] [2020-12-22 09:39:04,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:39:04,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:39:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:39:04,972 INFO L87 Difference]: Start difference. First operand 7580 states and 10948 transitions. Second operand 17 states. [2020-12-22 09:39:06,886 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 09:39:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:09,158 INFO L93 Difference]: Finished difference Result 31451 states and 43006 transitions. [2020-12-22 09:39:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:39:09,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:39:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:09,216 INFO L225 Difference]: With dead ends: 31451 [2020-12-22 09:39:09,216 INFO L226 Difference]: Without dead ends: 26540 [2020-12-22 09:39:09,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:39:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2020-12-22 09:39:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 15253. [2020-12-22 09:39:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15253 states. [2020-12-22 09:39:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15253 states to 15253 states and 21234 transitions. [2020-12-22 09:39:10,937 INFO L78 Accepts]: Start accepts. Automaton has 15253 states and 21234 transitions. Word has length 67 [2020-12-22 09:39:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:10,937 INFO L481 AbstractCegarLoop]: Abstraction has 15253 states and 21234 transitions. [2020-12-22 09:39:10,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:39:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15253 states and 21234 transitions. [2020-12-22 09:39:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:10,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:10,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:11,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:39:11,155 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:11,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:39:11,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:11,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926695613] [2020-12-22 09:39:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:11,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926695613] [2020-12-22 09:39:11,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966075110] [2020-12-22 09:39:11,403 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 09:39:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:39:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:11,674 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:11,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:11,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:39:11,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377013053] [2020-12-22 09:39:11,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:39:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:39:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:39:11,977 INFO L87 Difference]: Start difference. First operand 15253 states and 21234 transitions. Second operand 17 states. [2020-12-22 09:39:12,172 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:39:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:19,088 INFO L93 Difference]: Finished difference Result 76692 states and 103890 transitions. [2020-12-22 09:39:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:39:19,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:39:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:19,244 INFO L225 Difference]: With dead ends: 76692 [2020-12-22 09:39:19,244 INFO L226 Difference]: Without dead ends: 65262 [2020-12-22 09:39:19,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:39:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65262 states. [2020-12-22 09:39:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65262 to 33304. [2020-12-22 09:39:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33304 states. [2020-12-22 09:39:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33304 states to 33304 states and 45502 transitions. [2020-12-22 09:39:22,865 INFO L78 Accepts]: Start accepts. Automaton has 33304 states and 45502 transitions. Word has length 67 [2020-12-22 09:39:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:22,866 INFO L481 AbstractCegarLoop]: Abstraction has 33304 states and 45502 transitions. [2020-12-22 09:39:22,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:39:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 33304 states and 45502 transitions. [2020-12-22 09:39:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:22,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:22,869 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] [2020-12-22 09:39:23,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:39:23,081 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:23,083 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:39:23,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:23,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396636078] [2020-12-22 09:39:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396636078] [2020-12-22 09:39:23,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:23,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:23,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601078413] [2020-12-22 09:39:23,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:23,235 INFO L87 Difference]: Start difference. First operand 33304 states and 45502 transitions. Second operand 3 states. [2020-12-22 09:39:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:24,847 INFO L93 Difference]: Finished difference Result 48522 states and 66111 transitions. [2020-12-22 09:39:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:24,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:39:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:24,887 INFO L225 Difference]: With dead ends: 48522 [2020-12-22 09:39:24,888 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 09:39:24,919 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 09:39:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 09:39:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19774. [2020-12-22 09:39:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19774 states. [2020-12-22 09:39:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 26664 transitions. [2020-12-22 09:39:26,620 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 26664 transitions. Word has length 67 [2020-12-22 09:39:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:26,620 INFO L481 AbstractCegarLoop]: Abstraction has 19774 states and 26664 transitions. [2020-12-22 09:39:26,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 26664 transitions. [2020-12-22 09:39:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:26,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:26,622 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] [2020-12-22 09:39:26,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:39:26,622 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:39:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:26,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071436493] [2020-12-22 09:39:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:26,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071436493] [2020-12-22 09:39:26,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:26,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:39:26,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255451958] [2020-12-22 09:39:26,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:39:26,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:39:26,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:39:26,675 INFO L87 Difference]: Start difference. First operand 19774 states and 26664 transitions. Second operand 3 states. [2020-12-22 09:39:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:28,173 INFO L93 Difference]: Finished difference Result 29676 states and 39795 transitions. [2020-12-22 09:39:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:39:28,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:39:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:28,198 INFO L225 Difference]: With dead ends: 29676 [2020-12-22 09:39:28,198 INFO L226 Difference]: Without dead ends: 13664 [2020-12-22 09:39:28,214 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 09:39:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13664 states. [2020-12-22 09:39:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13664 to 13662. [2020-12-22 09:39:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13662 states. [2020-12-22 09:39:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 18287 transitions. [2020-12-22 09:39:29,416 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 18287 transitions. Word has length 67 [2020-12-22 09:39:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:29,416 INFO L481 AbstractCegarLoop]: Abstraction has 13662 states and 18287 transitions. [2020-12-22 09:39:29,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:39:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 18287 transitions. [2020-12-22 09:39:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:29,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:29,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:29,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:39:29,420 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:39:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:29,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931305822] [2020-12-22 09:39:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:39:29,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931305822] [2020-12-22 09:39:29,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:29,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672053607] [2020-12-22 09:39:29,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:29,489 INFO L87 Difference]: Start difference. First operand 13662 states and 18287 transitions. Second operand 6 states. [2020-12-22 09:39:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:30,440 INFO L93 Difference]: Finished difference Result 23425 states and 30839 transitions. [2020-12-22 09:39:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:30,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:30,457 INFO L225 Difference]: With dead ends: 23425 [2020-12-22 09:39:30,458 INFO L226 Difference]: Without dead ends: 11373 [2020-12-22 09:39:30,470 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 09:39:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2020-12-22 09:39:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11373. [2020-12-22 09:39:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11373 states. [2020-12-22 09:39:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11373 states to 11373 states and 15168 transitions. [2020-12-22 09:39:31,885 INFO L78 Accepts]: Start accepts. Automaton has 11373 states and 15168 transitions. Word has length 67 [2020-12-22 09:39:31,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:31,886 INFO L481 AbstractCegarLoop]: Abstraction has 11373 states and 15168 transitions. [2020-12-22 09:39:31,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:31,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11373 states and 15168 transitions. [2020-12-22 09:39:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:31,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:31,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:31,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:39:31,889 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:31,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:39:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:31,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886419659] [2020-12-22 09:39:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:39:31,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886419659] [2020-12-22 09:39:31,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:31,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095410455] [2020-12-22 09:39:31,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:31,977 INFO L87 Difference]: Start difference. First operand 11373 states and 15168 transitions. Second operand 6 states. [2020-12-22 09:39:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:32,727 INFO L93 Difference]: Finished difference Result 18542 states and 24231 transitions. [2020-12-22 09:39:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:32,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:32,742 INFO L225 Difference]: With dead ends: 18542 [2020-12-22 09:39:32,742 INFO L226 Difference]: Without dead ends: 8813 [2020-12-22 09:39:32,750 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 09:39:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2020-12-22 09:39:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2020-12-22 09:39:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-12-22 09:39:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 11820 transitions. [2020-12-22 09:39:33,500 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 11820 transitions. Word has length 67 [2020-12-22 09:39:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:33,500 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 11820 transitions. [2020-12-22 09:39:33,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 11820 transitions. [2020-12-22 09:39:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:39:33,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:33,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:33,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:39:33,503 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:39:33,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:33,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388173003] [2020-12-22 09:39:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:39:33,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388173003] [2020-12-22 09:39:33,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:39:33,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:39:33,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535669143] [2020-12-22 09:39:33,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:39:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:39:33,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:39:33,573 INFO L87 Difference]: Start difference. First operand 8813 states and 11820 transitions. Second operand 6 states. [2020-12-22 09:39:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:34,229 INFO L93 Difference]: Finished difference Result 14363 states and 18765 transitions. [2020-12-22 09:39:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:39:34,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:39:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:34,236 INFO L225 Difference]: With dead ends: 14363 [2020-12-22 09:39:34,237 INFO L226 Difference]: Without dead ends: 7116 [2020-12-22 09:39:34,241 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 09:39:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7116 states. [2020-12-22 09:39:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7116 to 7116. [2020-12-22 09:39:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7116 states. [2020-12-22 09:39:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 9674 transitions. [2020-12-22 09:39:34,735 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 9674 transitions. Word has length 67 [2020-12-22 09:39:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:34,736 INFO L481 AbstractCegarLoop]: Abstraction has 7116 states and 9674 transitions. [2020-12-22 09:39:34,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:39:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 9674 transitions. [2020-12-22 09:39:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:39:34,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:34,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:34,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:39:34,737 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:39:34,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:34,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300286361] [2020-12-22 09:39:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:35,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300286361] [2020-12-22 09:39:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444399378] [2020-12-22 09:39:35,231 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 09:39:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:39:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:36,219 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-22 09:39:36,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:39:36,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:36,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:36,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:36,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:36,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:39:36,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41119673] [2020-12-22 09:39:36,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:39:36,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:39:36,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:39:36,853 INFO L87 Difference]: Start difference. First operand 7116 states and 9674 transitions. Second operand 26 states. [2020-12-22 09:39:37,752 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 09:39:37,953 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:39:38,239 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:39:38,500 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:39:38,755 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:39,016 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:39,287 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:39:39,566 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:39:39,868 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:39:40,092 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:39:40,267 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:39:40,463 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:39:40,995 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:39:41,423 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:39:41,627 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:39:41,976 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-12-22 09:39:42,274 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 09:39:42,599 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:39:42,761 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:39:43,214 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:39:43,948 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:39:44,380 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:39:44,701 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:39:44,943 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:39:45,239 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:39:45,476 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:39:45,699 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:39:45,976 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:39:46,150 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:39:46,573 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:39:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:48,641 INFO L93 Difference]: Finished difference Result 13247 states and 17367 transitions. [2020-12-22 09:39:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:39:48,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:39:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:48,655 INFO L225 Difference]: With dead ends: 13247 [2020-12-22 09:39:48,655 INFO L226 Difference]: Without dead ends: 10342 [2020-12-22 09:39:48,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1297, Invalid=6359, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:39:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10342 states. [2020-12-22 09:39:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10342 to 6278. [2020-12-22 09:39:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:39:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 8693 transitions. [2020-12-22 09:39:49,329 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 8693 transitions. Word has length 68 [2020-12-22 09:39:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:49,330 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 8693 transitions. [2020-12-22 09:39:49,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:39:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 8693 transitions. [2020-12-22 09:39:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:39:49,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:49,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:39:49,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:49,532 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:39:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:49,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680842480] [2020-12-22 09:39:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:50,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680842480] [2020-12-22 09:39:50,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994545799] [2020-12-22 09:39:50,496 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 09:39:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:39:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:52,716 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:39:52,733 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:39:52,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:39:52,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:39:53,342 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44