/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.7.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:15:03,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:15:03,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:15:03,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:15:03,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:15:03,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:15:03,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:15:03,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:15:03,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:15:03,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:15:03,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:15:03,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:15:03,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:15:03,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:15:03,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:15:03,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:15:03,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:15:03,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:15:03,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:15:03,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:15:03,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:15:04,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:15:04,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:15:04,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:15:04,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:15:04,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:15:04,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:15:04,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:15:04,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:15:04,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:15:04,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:15:04,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:15:04,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:15:04,102 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:15:04,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:15:04,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:15:04,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:15:04,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:15:04,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:15:04,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:15:04,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:15:04,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:15:04,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:15:04,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:15:04,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:15:04,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:15:04,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:15:04,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:15:04,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:15:04,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:15:04,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:15:04,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:15:04,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:15:04,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:15:04,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:15:04,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:15:04,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:15:04,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:15:04,558 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:15:04,562 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:15:04,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:15:04,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1605426af/ba90063e0ff049e9b11c32c867adae87/FLAG5881bf27b [2020-12-22 10:15:05,571 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:15:05,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:15:05,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1605426af/ba90063e0ff049e9b11c32c867adae87/FLAG5881bf27b [2020-12-22 10:15:06,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1605426af/ba90063e0ff049e9b11c32c867adae87 [2020-12-22 10:15:06,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:15:06,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:15:06,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:06,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:15:06,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:15:06,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:06" (1/1) ... [2020-12-22 10:15:06,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2071dedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:06, skipping insertion in model container [2020-12-22 10:15:06,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:15:06" (1/1) ... [2020-12-22 10:15:06,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:15:06,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:15:06,900 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.7.ufo.UNBOUNDED.pals+Problem12_label01.c[20572,20585] [2020-12-22 10:15:06,992 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.7.ufo.UNBOUNDED.pals+Problem12_label01.c[25884,25897] [2020-12-22 10:15:07,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:07,995 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:15:08,088 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.7.ufo.UNBOUNDED.pals+Problem12_label01.c[20572,20585] [2020-12-22 10:15:08,140 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.7.ufo.UNBOUNDED.pals+Problem12_label01.c[25884,25897] [2020-12-22 10:15:08,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:15:08,802 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:15:08,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08 WrapperNode [2020-12-22 10:15:08,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:15:08,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:08,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:15:08,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:15:08,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:08,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:15:09,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:15:09,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:15:09,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:15:09,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (1/1) ... [2020-12-22 10:15:09,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:15:09,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:15:09,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:15:09,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:15:09,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (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 10:15:10,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:15:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:15:10,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:15:10,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:15:15,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:15:15,642 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:15:15,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:15 BoogieIcfgContainer [2020-12-22 10:15:15,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:15:15,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:15:15,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:15:15,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:15:15,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:15:06" (1/3) ... [2020-12-22 10:15:15,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd093b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:15, skipping insertion in model container [2020-12-22 10:15:15,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:15:08" (2/3) ... [2020-12-22 10:15:15,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd093b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:15, skipping insertion in model container [2020-12-22 10:15:15,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:15" (3/3) ... [2020-12-22 10:15:15,659 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:15:15,666 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:15:15,673 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:15:15,692 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:15:15,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:15:15,733 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:15:15,733 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:15:15,733 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:15:15,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:15:15,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:15:15,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:15:15,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:15:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:15:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:15:15,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:15,787 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] [2020-12-22 10:15:15,788 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:15:15,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:15,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416815237] [2020-12-22 10:15:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:16,070 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 10:15:16,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416815237] [2020-12-22 10:15:16,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:16,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:15:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097755121] [2020-12-22 10:15:16,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:15:16,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:16,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:15:16,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:15:16,101 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:15:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:16,201 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:15:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:15:16,203 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:15:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:16,255 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:15:16,255 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:15:16,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:15:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:15:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:15:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:15:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:15:16,369 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:15:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:16,370 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:15:16,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:15:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:15:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:15:16,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:16,373 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] [2020-12-22 10:15:16,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:15:16,374 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:15:16,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:16,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801843517] [2020-12-22 10:15:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:16,608 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 10:15:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801843517] [2020-12-22 10:15:16,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:16,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:15:16,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880302944] [2020-12-22 10:15:16,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:15:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:15:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:15:16,614 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:15:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:16,825 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:15:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:15:16,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:15:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:16,833 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:15:16,833 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:15:16,835 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 10:15:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:15:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:15:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:15:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:15:16,891 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:15:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:16,891 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:15:16,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:15:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:15:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:15:16,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:16,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:16,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:15:16,903 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash -829720843, now seen corresponding path program 1 times [2020-12-22 10:15:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777476964] [2020-12-22 10:15:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:17,079 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 10:15:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777476964] [2020-12-22 10:15:17,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:17,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:15:17,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840437888] [2020-12-22 10:15:17,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:17,083 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:15:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:22,670 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:15:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:22,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:15:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:22,686 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:15:22,686 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:15:22,688 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 10:15:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:15:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:15:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:15:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2632 transitions. [2020-12-22 10:15:22,730 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2632 transitions. Word has length 48 [2020-12-22 10:15:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:22,730 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2632 transitions. [2020-12-22 10:15:22,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2632 transitions. [2020-12-22 10:15:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:22,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:22,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:22,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:15:22,733 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:15:22,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:22,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658096351] [2020-12-22 10:15:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:22,878 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 10:15:22,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658096351] [2020-12-22 10:15:22,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:22,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:22,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30646710] [2020-12-22 10:15:22,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:22,881 INFO L87 Difference]: Start difference. First operand 1630 states and 2632 transitions. Second operand 3 states. [2020-12-22 10:15:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:22,925 INFO L93 Difference]: Finished difference Result 1762 states and 2842 transitions. [2020-12-22 10:15:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:22,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:22,935 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:15:22,935 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:15:22,937 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 10:15:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:15:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:15:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:15:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2730 transitions. [2020-12-22 10:15:22,978 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2730 transitions. Word has length 91 [2020-12-22 10:15:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:22,978 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 2730 transitions. [2020-12-22 10:15:22,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2730 transitions. [2020-12-22 10:15:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:22,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:22,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:22,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:15:22,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:15:22,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:22,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511119768] [2020-12-22 10:15:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:23,081 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 10:15:23,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511119768] [2020-12-22 10:15:23,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:23,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925993595] [2020-12-22 10:15:23,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:23,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:23,084 INFO L87 Difference]: Start difference. First operand 1691 states and 2730 transitions. Second operand 3 states. [2020-12-22 10:15:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:23,131 INFO L93 Difference]: Finished difference Result 1939 states and 3126 transitions. [2020-12-22 10:15:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:23,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:23,142 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:15:23,143 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:15:23,144 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 10:15:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:15:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:15:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:15:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2915 transitions. [2020-12-22 10:15:23,192 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2915 transitions. Word has length 91 [2020-12-22 10:15:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:23,193 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 2915 transitions. [2020-12-22 10:15:23,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2915 transitions. [2020-12-22 10:15:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:23,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:23,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:23,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:15:23,195 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:15:23,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:23,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508884151] [2020-12-22 10:15:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:23,314 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 10:15:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508884151] [2020-12-22 10:15:23,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:23,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966946079] [2020-12-22 10:15:23,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:23,322 INFO L87 Difference]: Start difference. First operand 1807 states and 2915 transitions. Second operand 3 states. [2020-12-22 10:15:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:23,394 INFO L93 Difference]: Finished difference Result 2275 states and 3661 transitions. [2020-12-22 10:15:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:23,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:23,412 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:15:23,413 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:15:23,415 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 10:15:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:15:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:15:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:15:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3263 transitions. [2020-12-22 10:15:23,487 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3263 transitions. Word has length 91 [2020-12-22 10:15:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:23,489 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3263 transitions. [2020-12-22 10:15:23,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3263 transitions. [2020-12-22 10:15:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:23,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:23,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:23,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:15:23,499 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:15:23,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:23,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818519990] [2020-12-22 10:15:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:23,619 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 10:15:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818519990] [2020-12-22 10:15:23,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:23,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145728297] [2020-12-22 10:15:23,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:23,622 INFO L87 Difference]: Start difference. First operand 2027 states and 3263 transitions. Second operand 3 states. [2020-12-22 10:15:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:23,684 INFO L93 Difference]: Finished difference Result 2911 states and 4665 transitions. [2020-12-22 10:15:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:23,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:23,698 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:15:23,699 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:15:23,701 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 10:15:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:15:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:15:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:15:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3915 transitions. [2020-12-22 10:15:23,777 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3915 transitions. Word has length 91 [2020-12-22 10:15:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:23,778 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 3915 transitions. [2020-12-22 10:15:23,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3915 transitions. [2020-12-22 10:15:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:23,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:23,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:15:23,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:23,780 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:15:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374528838] [2020-12-22 10:15:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:23,877 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 10:15:23,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374528838] [2020-12-22 10:15:23,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:23,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361425155] [2020-12-22 10:15:23,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:23,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:23,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:23,880 INFO L87 Difference]: Start difference. First operand 2443 states and 3915 transitions. Second operand 3 states. [2020-12-22 10:15:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:23,963 INFO L93 Difference]: Finished difference Result 4111 states and 6541 transitions. [2020-12-22 10:15:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:23,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:23,982 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:15:23,982 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:15:23,985 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 10:15:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:15:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:15:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:15:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5131 transitions. [2020-12-22 10:15:24,097 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5131 transitions. Word has length 91 [2020-12-22 10:15:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:24,098 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5131 transitions. [2020-12-22 10:15:24,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5131 transitions. [2020-12-22 10:15:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:24,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:24,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:24,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:15:24,100 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:15:24,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202745091] [2020-12-22 10:15:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:24,266 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 10:15:24,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202745091] [2020-12-22 10:15:24,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:24,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134937295] [2020-12-22 10:15:24,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:24,269 INFO L87 Difference]: Start difference. First operand 3227 states and 5131 transitions. Second operand 9 states. [2020-12-22 10:15:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:25,659 INFO L93 Difference]: Finished difference Result 26551 states and 41657 transitions. [2020-12-22 10:15:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:15:25,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:15:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:25,785 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:15:25,785 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:15:25,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:15:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:15:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:15:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:15:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 7675 transitions. [2020-12-22 10:15:26,417 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 7675 transitions. Word has length 91 [2020-12-22 10:15:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:26,418 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 7675 transitions. [2020-12-22 10:15:26,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 7675 transitions. [2020-12-22 10:15:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:26,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:26,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:26,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:15:26,419 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:15:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732356969] [2020-12-22 10:15:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:26,545 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 10:15:26,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732356969] [2020-12-22 10:15:26,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:26,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:26,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120564193] [2020-12-22 10:15:26,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:26,552 INFO L87 Difference]: Start difference. First operand 4891 states and 7675 transitions. Second operand 3 states. [2020-12-22 10:15:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:27,100 INFO L93 Difference]: Finished difference Result 11199 states and 17373 transitions. [2020-12-22 10:15:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:27,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:27,122 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:15:27,122 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:15:27,129 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 10:15:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:15:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:15:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:15:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11995 transitions. [2020-12-22 10:15:27,769 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11995 transitions. Word has length 93 [2020-12-22 10:15:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:27,769 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11995 transitions. [2020-12-22 10:15:27,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11995 transitions. [2020-12-22 10:15:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:27,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:27,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:15:27,772 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:15:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743682942] [2020-12-22 10:15:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:28,217 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 10:15:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743682942] [2020-12-22 10:15:28,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:28,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:28,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009530840] [2020-12-22 10:15:28,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:28,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:28,222 INFO L87 Difference]: Start difference. First operand 7803 states and 11995 transitions. Second operand 9 states. [2020-12-22 10:15:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:29,148 INFO L93 Difference]: Finished difference Result 14047 states and 21469 transitions. [2020-12-22 10:15:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:29,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:15:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:29,167 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:15:29,168 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:15:29,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:15:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:15:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:15:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:15:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11931 transitions. [2020-12-22 10:15:29,742 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11931 transitions. Word has length 93 [2020-12-22 10:15:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:29,742 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11931 transitions. [2020-12-22 10:15:29,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11931 transitions. [2020-12-22 10:15:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:29,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:29,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:15:29,744 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:15:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:29,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387172248] [2020-12-22 10:15:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:29,832 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 10:15:29,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387172248] [2020-12-22 10:15:29,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:29,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:29,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161274387] [2020-12-22 10:15:29,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:29,834 INFO L87 Difference]: Start difference. First operand 7803 states and 11931 transitions. Second operand 3 states. [2020-12-22 10:15:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:30,543 INFO L93 Difference]: Finished difference Result 19519 states and 29469 transitions. [2020-12-22 10:15:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:30,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:30,578 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:15:30,578 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:15:30,591 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 10:15:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:15:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:15:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:15:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 19931 transitions. [2020-12-22 10:15:31,544 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 19931 transitions. Word has length 93 [2020-12-22 10:15:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:31,545 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 19931 transitions. [2020-12-22 10:15:31,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 19931 transitions. [2020-12-22 10:15:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:15:31,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:31,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:31,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:15:31,547 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:15:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:31,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114631891] [2020-12-22 10:15:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:31,693 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 10:15:31,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114631891] [2020-12-22 10:15:31,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:31,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:15:31,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110688396] [2020-12-22 10:15:31,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:15:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:31,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:15:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:15:31,700 INFO L87 Difference]: Start difference. First operand 13275 states and 19931 transitions. Second operand 8 states. [2020-12-22 10:15:33,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:33,233 INFO L93 Difference]: Finished difference Result 22017 states and 32715 transitions. [2020-12-22 10:15:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:15:33,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:15:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:33,370 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:15:33,370 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:15:33,378 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 10:15:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:15:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:15:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:15:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20251 transitions. [2020-12-22 10:15:34,427 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20251 transitions. Word has length 94 [2020-12-22 10:15:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:34,427 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20251 transitions. [2020-12-22 10:15:34,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:15:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20251 transitions. [2020-12-22 10:15:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:15:34,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:34,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:34,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:15:34,430 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:15:34,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:34,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053715567] [2020-12-22 10:15:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:34,500 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 10:15:34,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053715567] [2020-12-22 10:15:34,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:34,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:34,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339069363] [2020-12-22 10:15:34,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:34,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:34,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:34,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:34,502 INFO L87 Difference]: Start difference. First operand 13659 states and 20251 transitions. Second operand 3 states. [2020-12-22 10:15:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:35,682 INFO L93 Difference]: Finished difference Result 25954 states and 38433 transitions. [2020-12-22 10:15:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:35,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:15:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:35,724 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:15:35,724 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:15:35,738 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 10:15:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:15:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:15:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:15:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28381 transitions. [2020-12-22 10:15:37,044 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28381 transitions. Word has length 95 [2020-12-22 10:15:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:37,044 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28381 transitions. [2020-12-22 10:15:37,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28381 transitions. [2020-12-22 10:15:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 10:15:37,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:37,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:37,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:15:37,049 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1023590464, now seen corresponding path program 1 times [2020-12-22 10:15:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:37,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207996227] [2020-12-22 10:15:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:37,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207996227] [2020-12-22 10:15:37,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:37,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:37,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569079963] [2020-12-22 10:15:37,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:15:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:15:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:15:37,222 INFO L87 Difference]: Start difference. First operand 19293 states and 28381 transitions. Second operand 4 states. [2020-12-22 10:15:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:46,007 INFO L93 Difference]: Finished difference Result 22338 states and 33346 transitions. [2020-12-22 10:15:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:15:46,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 10:15:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:46,050 INFO L225 Difference]: With dead ends: 22338 [2020-12-22 10:15:46,050 INFO L226 Difference]: Without dead ends: 20797 [2020-12-22 10:15:46,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:15:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20797 states. [2020-12-22 10:15:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20797 to 20795. [2020-12-22 10:15:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:15:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29950 transitions. [2020-12-22 10:15:47,193 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29950 transitions. Word has length 119 [2020-12-22 10:15:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:47,194 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 29950 transitions. [2020-12-22 10:15:47,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:15:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29950 transitions. [2020-12-22 10:15:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:15:47,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:47,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:47,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:15:47,206 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:15:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:47,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96192992] [2020-12-22 10:15:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:15:47,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96192992] [2020-12-22 10:15:47,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:47,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990199078] [2020-12-22 10:15:47,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:47,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:47,400 INFO L87 Difference]: Start difference. First operand 20795 states and 29950 transitions. Second operand 9 states. [2020-12-22 10:15:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:54,381 INFO L93 Difference]: Finished difference Result 148363 states and 215814 transitions. [2020-12-22 10:15:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:54,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:15:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:54,598 INFO L225 Difference]: With dead ends: 148363 [2020-12-22 10:15:54,599 INFO L226 Difference]: Without dead ends: 130633 [2020-12-22 10:15:54,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:15:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130633 states. [2020-12-22 10:15:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130633 to 38523. [2020-12-22 10:15:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38523 states. [2020-12-22 10:15:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38523 states to 38523 states and 55614 transitions. [2020-12-22 10:15:58,150 INFO L78 Accepts]: Start accepts. Automaton has 38523 states and 55614 transitions. Word has length 129 [2020-12-22 10:15:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:58,151 INFO L481 AbstractCegarLoop]: Abstraction has 38523 states and 55614 transitions. [2020-12-22 10:15:58,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 38523 states and 55614 transitions. [2020-12-22 10:15:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:15:58,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:58,165 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:58,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:15:58,165 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:15:58,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:58,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734986418] [2020-12-22 10:15:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:15:58,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734986418] [2020-12-22 10:15:58,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:58,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422050007] [2020-12-22 10:15:58,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:58,357 INFO L87 Difference]: Start difference. First operand 38523 states and 55614 transitions. Second operand 9 states. [2020-12-22 10:16:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:07,384 INFO L93 Difference]: Finished difference Result 166091 states and 241478 transitions. [2020-12-22 10:16:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:07,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:07,816 INFO L225 Difference]: With dead ends: 166091 [2020-12-22 10:16:07,817 INFO L226 Difference]: Without dead ends: 148361 [2020-12-22 10:16:07,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148361 states. [2020-12-22 10:16:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148361 to 65147. [2020-12-22 10:16:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65147 states. [2020-12-22 10:16:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65147 states to 65147 states and 93950 transitions. [2020-12-22 10:16:12,887 INFO L78 Accepts]: Start accepts. Automaton has 65147 states and 93950 transitions. Word has length 129 [2020-12-22 10:16:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:12,887 INFO L481 AbstractCegarLoop]: Abstraction has 65147 states and 93950 transitions. [2020-12-22 10:16:12,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 65147 states and 93950 transitions. [2020-12-22 10:16:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:12,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:12,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:12,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:16:12,908 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:16:12,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203947492] [2020-12-22 10:16:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:16:13,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203947492] [2020-12-22 10:16:13,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:13,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:13,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489534223] [2020-12-22 10:16:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:13,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:13,281 INFO L87 Difference]: Start difference. First operand 65147 states and 93950 transitions. Second operand 9 states. [2020-12-22 10:16:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:23,769 INFO L93 Difference]: Finished difference Result 183819 states and 267142 transitions. [2020-12-22 10:16:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:23,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:24,026 INFO L225 Difference]: With dead ends: 183819 [2020-12-22 10:16:24,026 INFO L226 Difference]: Without dead ends: 166089 [2020-12-22 10:16:24,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166089 states. [2020-12-22 10:16:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166089 to 82875. [2020-12-22 10:16:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82875 states. [2020-12-22 10:16:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82875 states to 82875 states and 119614 transitions. [2020-12-22 10:16:30,755 INFO L78 Accepts]: Start accepts. Automaton has 82875 states and 119614 transitions. Word has length 129 [2020-12-22 10:16:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:30,755 INFO L481 AbstractCegarLoop]: Abstraction has 82875 states and 119614 transitions. [2020-12-22 10:16:30,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 82875 states and 119614 transitions. [2020-12-22 10:16:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:30,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:30,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:16:30,770 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:16:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:30,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146051659] [2020-12-22 10:16:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:16:30,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146051659] [2020-12-22 10:16:30,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:30,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:30,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694657432] [2020-12-22 10:16:30,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:30,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:30,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:30,948 INFO L87 Difference]: Start difference. First operand 82875 states and 119614 transitions. Second operand 9 states. [2020-12-22 10:16:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:43,781 INFO L93 Difference]: Finished difference Result 201547 states and 292806 transitions. [2020-12-22 10:16:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:43,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:44,178 INFO L225 Difference]: With dead ends: 201547 [2020-12-22 10:16:44,178 INFO L226 Difference]: Without dead ends: 183817 [2020-12-22 10:16:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:16:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183817 states. [2020-12-22 10:16:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183817 to 100603. [2020-12-22 10:16:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100603 states. [2020-12-22 10:16:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100603 states to 100603 states and 145278 transitions. [2020-12-22 10:16:52,358 INFO L78 Accepts]: Start accepts. Automaton has 100603 states and 145278 transitions. Word has length 129 [2020-12-22 10:16:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:52,358 INFO L481 AbstractCegarLoop]: Abstraction has 100603 states and 145278 transitions. [2020-12-22 10:16:52,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 100603 states and 145278 transitions. [2020-12-22 10:16:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:52,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:52,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:16:52,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:16:52,370 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:16:52,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941384812] [2020-12-22 10:16:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:16:52,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941384812] [2020-12-22 10:16:52,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:52,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:52,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078560777] [2020-12-22 10:16:52,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:52,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:52,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:52,578 INFO L87 Difference]: Start difference. First operand 100603 states and 145278 transitions. Second operand 9 states. [2020-12-22 10:17:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:08,417 INFO L93 Difference]: Finished difference Result 219275 states and 318470 transitions. [2020-12-22 10:17:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:08,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:08,719 INFO L225 Difference]: With dead ends: 219275 [2020-12-22 10:17:08,719 INFO L226 Difference]: Without dead ends: 201545 [2020-12-22 10:17:08,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201545 states. [2020-12-22 10:17:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201545 to 118331. [2020-12-22 10:17:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118331 states. [2020-12-22 10:17:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118331 states to 118331 states and 170942 transitions. [2020-12-22 10:17:18,995 INFO L78 Accepts]: Start accepts. Automaton has 118331 states and 170942 transitions. Word has length 129 [2020-12-22 10:17:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:18,995 INFO L481 AbstractCegarLoop]: Abstraction has 118331 states and 170942 transitions. [2020-12-22 10:17:18,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 118331 states and 170942 transitions. [2020-12-22 10:17:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:19,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:19,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:19,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:17:19,007 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:17:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11426471] [2020-12-22 10:17:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:17:19,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11426471] [2020-12-22 10:17:19,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:19,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:19,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48194636] [2020-12-22 10:17:19,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:19,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:19,459 INFO L87 Difference]: Start difference. First operand 118331 states and 170942 transitions. Second operand 9 states. [2020-12-22 10:17:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:38,173 INFO L93 Difference]: Finished difference Result 237003 states and 344134 transitions. [2020-12-22 10:17:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:38,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:38,650 INFO L225 Difference]: With dead ends: 237003 [2020-12-22 10:17:38,650 INFO L226 Difference]: Without dead ends: 219273 [2020-12-22 10:17:38,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:17:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219273 states. [2020-12-22 10:17:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219273 to 136059. [2020-12-22 10:17:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136059 states. [2020-12-22 10:17:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136059 states to 136059 states and 196606 transitions. [2020-12-22 10:17:51,360 INFO L78 Accepts]: Start accepts. Automaton has 136059 states and 196606 transitions. Word has length 129 [2020-12-22 10:17:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:51,360 INFO L481 AbstractCegarLoop]: Abstraction has 136059 states and 196606 transitions. [2020-12-22 10:17:51,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 136059 states and 196606 transitions. [2020-12-22 10:17:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:17:51,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:51,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:17:51,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:17:51,379 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:17:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:51,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932801762] [2020-12-22 10:17:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:17:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932801762] [2020-12-22 10:17:51,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:51,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:51,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330608344] [2020-12-22 10:17:51,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:51,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:51,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:51,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:51,771 INFO L87 Difference]: Start difference. First operand 136059 states and 196606 transitions. Second operand 3 states. [2020-12-22 10:18:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:00,250 INFO L93 Difference]: Finished difference Result 228260 states and 331053 transitions. [2020-12-22 10:18:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:00,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:18:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:00,358 INFO L225 Difference]: With dead ends: 228260 [2020-12-22 10:18:00,359 INFO L226 Difference]: Without dead ends: 95266 [2020-12-22 10:18:00,409 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 10:18:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95266 states. [2020-12-22 10:18:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95266 to 95264. [2020-12-22 10:18:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95264 states. [2020-12-22 10:18:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95264 states to 95264 states and 137578 transitions. [2020-12-22 10:18:08,928 INFO L78 Accepts]: Start accepts. Automaton has 95264 states and 137578 transitions. Word has length 131 [2020-12-22 10:18:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:08,928 INFO L481 AbstractCegarLoop]: Abstraction has 95264 states and 137578 transitions. [2020-12-22 10:18:08,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 95264 states and 137578 transitions. [2020-12-22 10:18:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:08,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:08,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:18:08,939 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:18:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088452625] [2020-12-22 10:18:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:18:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088452625] [2020-12-22 10:18:09,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:09,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711005316] [2020-12-22 10:18:09,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:09,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:09,113 INFO L87 Difference]: Start difference. First operand 95264 states and 137578 transitions. Second operand 9 states. [2020-12-22 10:18:09,384 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 10:18:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:25,869 INFO L93 Difference]: Finished difference Result 181296 states and 263026 transitions. [2020-12-22 10:18:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:25,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:18:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:26,267 INFO L225 Difference]: With dead ends: 181296 [2020-12-22 10:18:26,268 INFO L226 Difference]: Without dead ends: 169006 [2020-12-22 10:18:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:18:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169006 states. [2020-12-22 10:18:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169006 to 107552. [2020-12-22 10:18:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107552 states. [2020-12-22 10:18:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107552 states to 107552 states and 155370 transitions. [2020-12-22 10:18:37,248 INFO L78 Accepts]: Start accepts. Automaton has 107552 states and 155370 transitions. Word has length 131 [2020-12-22 10:18:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:37,249 INFO L481 AbstractCegarLoop]: Abstraction has 107552 states and 155370 transitions. [2020-12-22 10:18:37,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 107552 states and 155370 transitions. [2020-12-22 10:18:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:18:37,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:37,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:37,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:18:37,262 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:37,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:18:37,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:37,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216225088] [2020-12-22 10:18:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:37,508 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 10:18:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:37,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216225088] [2020-12-22 10:18:37,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:37,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:37,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569555492] [2020-12-22 10:18:37,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:37,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:37,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:37,535 INFO L87 Difference]: Start difference. First operand 107552 states and 155370 transitions. Second operand 3 states. [2020-12-22 10:18:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:43,294 INFO L93 Difference]: Finished difference Result 159780 states and 230988 transitions. [2020-12-22 10:18:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:43,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:18:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:43,356 INFO L225 Difference]: With dead ends: 159780 [2020-12-22 10:18:43,356 INFO L226 Difference]: Without dead ends: 55330 [2020-12-22 10:18:43,403 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 10:18:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55330 states. [2020-12-22 10:18:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55330 to 55328. [2020-12-22 10:18:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55328 states. [2020-12-22 10:18:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55328 states to 55328 states and 79210 transitions. [2020-12-22 10:18:48,837 INFO L78 Accepts]: Start accepts. Automaton has 55328 states and 79210 transitions. Word has length 132 [2020-12-22 10:18:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:48,838 INFO L481 AbstractCegarLoop]: Abstraction has 55328 states and 79210 transitions. [2020-12-22 10:18:48,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 55328 states and 79210 transitions. [2020-12-22 10:18:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:18:48,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:48,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:18:48,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:18:48,845 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:18:48,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:48,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330604005] [2020-12-22 10:18:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:18:49,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330604005] [2020-12-22 10:18:49,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078546358] [2020-12-22 10:18:49,120 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 10:18:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:49,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:18:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:18:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:18:49,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:18:49,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:18:49,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293598172] [2020-12-22 10:18:49,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:18:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:49,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:18:49,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:18:49,758 INFO L87 Difference]: Start difference. First operand 55328 states and 79210 transitions. Second operand 12 states.