/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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:14:54,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:14:54,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:14:54,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:14:54,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:14:54,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:14:54,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:14:54,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:14:54,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:14:54,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:14:54,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:14:54,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:14:54,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:14:54,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:14:54,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:14:54,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:14:54,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:14:54,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:14:54,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:14:54,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:14:54,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:14:54,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:14:54,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:14:54,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:14:54,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:14:54,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:14:54,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:14:54,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:14:54,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:14:54,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:14:54,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:14:54,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:14:54,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:14:54,510 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:14:54,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:14:54,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:14:54,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:14:54,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:14:54,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:14:54,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:14:54,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:14:54,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:14:54,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:14:54,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:14:54,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:14:54,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:14:54,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:14:54,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:14:54,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:14:54,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:14:54,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:14:54,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:14:54,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:14:54,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:14:54,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:14:54,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:14:54,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:14:54,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:14:54,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:14:54,931 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:14:54,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:14:55,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4feac86/a416c73e1e5b463997ec470913df5f10/FLAGece7d6043 [2020-12-22 10:14:56,213 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:14:56,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:14:56,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4feac86/a416c73e1e5b463997ec470913df5f10/FLAGece7d6043 [2020-12-22 10:14:56,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4feac86/a416c73e1e5b463997ec470913df5f10 [2020-12-22 10:14:56,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:14:56,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:14:56,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:14:56,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:14:56,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:14:56,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:14:56" (1/1) ... [2020-12-22 10:14:56,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ff0a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:56, skipping insertion in model container [2020-12-22 10:14:56,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:14:56" (1/1) ... [2020-12-22 10:14:56,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:14:56,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:14:57,191 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_label00.c[20572,20585] [2020-12-22 10:14:57,229 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_label00.c[22204,22217] [2020-12-22 10:14:58,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:14:58,216 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:14:58,309 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_label00.c[20572,20585] [2020-12-22 10:14:58,317 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_label00.c[22204,22217] [2020-12-22 10:14:58,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:14:59,021 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:14:59,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59 WrapperNode [2020-12-22 10:14:59,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:14:59,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:14:59,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:14:59,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:14:59,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:14:59,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:14:59,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:14:59,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:14:59,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:14:59,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:15:00,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:15:00,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (1/1) ... [2020-12-22 10:15:00,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:15:00,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:15:00,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:15:00,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:15:00,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (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 10:15:00,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:15:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:15:00,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:15:00,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:15:05,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:15:05,218 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:15:05,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:05 BoogieIcfgContainer [2020-12-22 10:15:05,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:15:05,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:15:05,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:15:05,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:15:05,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:14:56" (1/3) ... [2020-12-22 10:15:05,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b475f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:05, skipping insertion in model container [2020-12-22 10:15:05,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:14:59" (2/3) ... [2020-12-22 10:15:05,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b475f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:15:05, skipping insertion in model container [2020-12-22 10:15:05,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:15:05" (3/3) ... [2020-12-22 10:15:05,240 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label00.c [2020-12-22 10:15:05,247 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:15:05,253 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:15:05,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:15:05,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:15:05,308 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:15:05,308 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:15:05,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:15:05,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:15:05,309 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:15:05,309 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:15:05,309 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:15:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:15:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:15:05,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:05,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:15:05,354 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash 667255413, now seen corresponding path program 1 times [2020-12-22 10:15:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:05,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145773691] [2020-12-22 10:15:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:05,681 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 10:15:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145773691] [2020-12-22 10:15:05,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:05,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:15:05,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888274769] [2020-12-22 10:15:05,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:05,714 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 3 states. [2020-12-22 10:15:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:11,372 INFO L93 Difference]: Finished difference Result 2587 states and 4968 transitions. [2020-12-22 10:15:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:11,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 10:15:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:11,419 INFO L225 Difference]: With dead ends: 2587 [2020-12-22 10:15:11,420 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:15:11,445 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 10:15:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:15:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:15:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:15:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2562 transitions. [2020-12-22 10:15:11,618 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2562 transitions. Word has length 16 [2020-12-22 10:15:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:11,619 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2562 transitions. [2020-12-22 10:15:11,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2562 transitions. [2020-12-22 10:15:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:15:11,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:11,624 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 10:15:11,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:15:11,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:15:11,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:11,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111567988] [2020-12-22 10:15:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:11,772 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 10:15:11,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111567988] [2020-12-22 10:15:11,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:11,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:15:11,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731562983] [2020-12-22 10:15:11,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:15:11,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:15:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:15:11,780 INFO L87 Difference]: Start difference. First operand 1630 states and 2562 transitions. Second operand 5 states. [2020-12-22 10:15:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:11,894 INFO L93 Difference]: Finished difference Result 1703 states and 2676 transitions. [2020-12-22 10:15:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:15:11,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:15:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:11,904 INFO L225 Difference]: With dead ends: 1703 [2020-12-22 10:15:11,904 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:15:11,906 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 10:15:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:15:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:15:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:15:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2512 transitions. [2020-12-22 10:15:11,948 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2512 transitions. Word has length 42 [2020-12-22 10:15:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:11,948 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2512 transitions. [2020-12-22 10:15:11,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:15:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2512 transitions. [2020-12-22 10:15:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 10:15:11,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:11,953 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] [2020-12-22 10:15:11,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:15:11,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 574010816, now seen corresponding path program 1 times [2020-12-22 10:15:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:11,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958108989] [2020-12-22 10:15:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958108989] [2020-12-22 10:15:12,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:12,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434097296] [2020-12-22 10:15:12,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:12,117 INFO L87 Difference]: Start difference. First operand 1630 states and 2512 transitions. Second operand 3 states. [2020-12-22 10:15:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:17,004 INFO L93 Difference]: Finished difference Result 4636 states and 7199 transitions. [2020-12-22 10:15:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:17,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 10:15:17,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:17,022 INFO L225 Difference]: With dead ends: 4636 [2020-12-22 10:15:17,023 INFO L226 Difference]: Without dead ends: 3132 [2020-12-22 10:15:17,026 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 10:15:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2020-12-22 10:15:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3132. [2020-12-22 10:15:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3132 states. [2020-12-22 10:15:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 4590 transitions. [2020-12-22 10:15:17,102 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 4590 transitions. Word has length 87 [2020-12-22 10:15:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:17,103 INFO L481 AbstractCegarLoop]: Abstraction has 3132 states and 4590 transitions. [2020-12-22 10:15:17,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 4590 transitions. [2020-12-22 10:15:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 10:15:17,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:17,106 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] [2020-12-22 10:15:17,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:15:17,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash -727276923, now seen corresponding path program 1 times [2020-12-22 10:15:17,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:17,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591826638] [2020-12-22 10:15:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:15:17,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591826638] [2020-12-22 10:15:17,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:17,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745168221] [2020-12-22 10:15:17,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:15:17,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:15:17,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:15:17,308 INFO L87 Difference]: Start difference. First operand 3132 states and 4590 transitions. Second operand 4 states. [2020-12-22 10:15:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:25,282 INFO L93 Difference]: Finished difference Result 9901 states and 14348 transitions. [2020-12-22 10:15:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:15:25,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-12-22 10:15:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:25,324 INFO L225 Difference]: With dead ends: 9901 [2020-12-22 10:15:25,325 INFO L226 Difference]: Without dead ends: 6895 [2020-12-22 10:15:25,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:15:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2020-12-22 10:15:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 6887. [2020-12-22 10:15:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6887 states. [2020-12-22 10:15:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6887 states to 6887 states and 9420 transitions. [2020-12-22 10:15:25,511 INFO L78 Accepts]: Start accepts. Automaton has 6887 states and 9420 transitions. Word has length 89 [2020-12-22 10:15:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:25,514 INFO L481 AbstractCegarLoop]: Abstraction has 6887 states and 9420 transitions. [2020-12-22 10:15:25,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:15:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6887 states and 9420 transitions. [2020-12-22 10:15:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:25,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:25,517 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 10:15:25,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:15:25,517 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:15:25,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:25,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880709657] [2020-12-22 10:15:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:25,736 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 10:15:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880709657] [2020-12-22 10:15:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:25,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:25,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951214698] [2020-12-22 10:15:25,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:25,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:25,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:25,742 INFO L87 Difference]: Start difference. First operand 6887 states and 9420 transitions. Second operand 3 states. [2020-12-22 10:15:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:25,820 INFO L93 Difference]: Finished difference Result 7019 states and 9630 transitions. [2020-12-22 10:15:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:25,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:25,853 INFO L225 Difference]: With dead ends: 7019 [2020-12-22 10:15:25,853 INFO L226 Difference]: Without dead ends: 6950 [2020-12-22 10:15:25,857 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 10:15:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2020-12-22 10:15:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6948. [2020-12-22 10:15:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6948 states. [2020-12-22 10:15:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6948 states to 6948 states and 9518 transitions. [2020-12-22 10:15:26,027 INFO L78 Accepts]: Start accepts. Automaton has 6948 states and 9518 transitions. Word has length 91 [2020-12-22 10:15:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:26,027 INFO L481 AbstractCegarLoop]: Abstraction has 6948 states and 9518 transitions. [2020-12-22 10:15:26,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6948 states and 9518 transitions. [2020-12-22 10:15:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:26,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:26,029 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 10:15:26,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:15:26,030 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:15:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:26,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487335458] [2020-12-22 10:15:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:26,151 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 10:15:26,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487335458] [2020-12-22 10:15:26,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:26,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:26,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899698652] [2020-12-22 10:15:26,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:26,157 INFO L87 Difference]: Start difference. First operand 6948 states and 9518 transitions. Second operand 3 states. [2020-12-22 10:15:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:26,226 INFO L93 Difference]: Finished difference Result 7196 states and 9914 transitions. [2020-12-22 10:15:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:26,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:26,267 INFO L225 Difference]: With dead ends: 7196 [2020-12-22 10:15:26,267 INFO L226 Difference]: Without dead ends: 7066 [2020-12-22 10:15:26,271 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 10:15:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2020-12-22 10:15:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 7064. [2020-12-22 10:15:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7064 states. [2020-12-22 10:15:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 9703 transitions. [2020-12-22 10:15:26,441 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 9703 transitions. Word has length 91 [2020-12-22 10:15:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:26,442 INFO L481 AbstractCegarLoop]: Abstraction has 7064 states and 9703 transitions. [2020-12-22 10:15:26,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 9703 transitions. [2020-12-22 10:15:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:26,450 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 10:15:26,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:15:26,451 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:15:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:26,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904170568] [2020-12-22 10:15:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:26,573 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 10:15:26,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904170568] [2020-12-22 10:15:26,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:26,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:26,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209745773] [2020-12-22 10:15:26,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:26,587 INFO L87 Difference]: Start difference. First operand 7064 states and 9703 transitions. Second operand 3 states. [2020-12-22 10:15:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:26,655 INFO L93 Difference]: Finished difference Result 7532 states and 10449 transitions. [2020-12-22 10:15:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:26,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:26,671 INFO L225 Difference]: With dead ends: 7532 [2020-12-22 10:15:26,671 INFO L226 Difference]: Without dead ends: 7286 [2020-12-22 10:15:26,676 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 10:15:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2020-12-22 10:15:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 7284. [2020-12-22 10:15:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7284 states. [2020-12-22 10:15:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 10051 transitions. [2020-12-22 10:15:26,812 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 10051 transitions. Word has length 91 [2020-12-22 10:15:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:26,812 INFO L481 AbstractCegarLoop]: Abstraction has 7284 states and 10051 transitions. [2020-12-22 10:15:26,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 10051 transitions. [2020-12-22 10:15:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:26,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:26,814 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 10:15:26,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:15:26,814 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:15:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609680024] [2020-12-22 10:15:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:26,924 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 10:15:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609680024] [2020-12-22 10:15:26,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:26,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121340629] [2020-12-22 10:15:26,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:26,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:26,927 INFO L87 Difference]: Start difference. First operand 7284 states and 10051 transitions. Second operand 3 states. [2020-12-22 10:15:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:26,994 INFO L93 Difference]: Finished difference Result 8168 states and 11453 transitions. [2020-12-22 10:15:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:26,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:27,010 INFO L225 Difference]: With dead ends: 8168 [2020-12-22 10:15:27,010 INFO L226 Difference]: Without dead ends: 7702 [2020-12-22 10:15:27,014 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 10:15:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2020-12-22 10:15:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 7700. [2020-12-22 10:15:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7700 states. [2020-12-22 10:15:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7700 states to 7700 states and 10703 transitions. [2020-12-22 10:15:27,162 INFO L78 Accepts]: Start accepts. Automaton has 7700 states and 10703 transitions. Word has length 91 [2020-12-22 10:15:27,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:27,162 INFO L481 AbstractCegarLoop]: Abstraction has 7700 states and 10703 transitions. [2020-12-22 10:15:27,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:27,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7700 states and 10703 transitions. [2020-12-22 10:15:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:27,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:27,164 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 10:15:27,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:15:27,164 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:15:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:27,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127283674] [2020-12-22 10:15:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:27,253 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 10:15:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127283674] [2020-12-22 10:15:27,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:27,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:27,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325466515] [2020-12-22 10:15:27,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:27,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:27,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:27,257 INFO L87 Difference]: Start difference. First operand 7700 states and 10703 transitions. Second operand 3 states. [2020-12-22 10:15:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:27,372 INFO L93 Difference]: Finished difference Result 9368 states and 13329 transitions. [2020-12-22 10:15:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:27,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:15:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:27,391 INFO L225 Difference]: With dead ends: 9368 [2020-12-22 10:15:27,391 INFO L226 Difference]: Without dead ends: 8486 [2020-12-22 10:15:27,396 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 10:15:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8486 states. [2020-12-22 10:15:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8486 to 8484. [2020-12-22 10:15:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8484 states. [2020-12-22 10:15:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8484 states to 8484 states and 11919 transitions. [2020-12-22 10:15:27,662 INFO L78 Accepts]: Start accepts. Automaton has 8484 states and 11919 transitions. Word has length 91 [2020-12-22 10:15:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:27,662 INFO L481 AbstractCegarLoop]: Abstraction has 8484 states and 11919 transitions. [2020-12-22 10:15:27,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8484 states and 11919 transitions. [2020-12-22 10:15:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:15:27,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:27,664 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 10:15:27,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:15:27,664 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:15:27,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:27,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415109272] [2020-12-22 10:15:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:27,818 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 10:15:27,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415109272] [2020-12-22 10:15:27,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:27,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:27,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841684735] [2020-12-22 10:15:27,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:27,825 INFO L87 Difference]: Start difference. First operand 8484 states and 11919 transitions. Second operand 9 states. [2020-12-22 10:15:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:29,032 INFO L93 Difference]: Finished difference Result 31808 states and 48445 transitions. [2020-12-22 10:15:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:15:29,033 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:15:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:29,099 INFO L225 Difference]: With dead ends: 31808 [2020-12-22 10:15:29,099 INFO L226 Difference]: Without dead ends: 30142 [2020-12-22 10:15:29,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:15:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30142 states. [2020-12-22 10:15:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30142 to 10148. [2020-12-22 10:15:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10148 states. [2020-12-22 10:15:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10148 states to 10148 states and 14463 transitions. [2020-12-22 10:15:29,561 INFO L78 Accepts]: Start accepts. Automaton has 10148 states and 14463 transitions. Word has length 91 [2020-12-22 10:15:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:29,561 INFO L481 AbstractCegarLoop]: Abstraction has 10148 states and 14463 transitions. [2020-12-22 10:15:29,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 10148 states and 14463 transitions. [2020-12-22 10:15:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:29,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:29,563 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 10:15:29,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:15:29,563 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:29,564 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:15:29,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:29,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170807245] [2020-12-22 10:15:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:29,649 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 10:15:29,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170807245] [2020-12-22 10:15:29,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:29,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722354053] [2020-12-22 10:15:29,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:29,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:29,651 INFO L87 Difference]: Start difference. First operand 10148 states and 14463 transitions. Second operand 3 states. [2020-12-22 10:15:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:30,117 INFO L93 Difference]: Finished difference Result 16456 states and 24161 transitions. [2020-12-22 10:15:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:30,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:30,144 INFO L225 Difference]: With dead ends: 16456 [2020-12-22 10:15:30,144 INFO L226 Difference]: Without dead ends: 13126 [2020-12-22 10:15:30,151 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 10:15:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2020-12-22 10:15:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 13060. [2020-12-22 10:15:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13060 states. [2020-12-22 10:15:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13060 states to 13060 states and 18783 transitions. [2020-12-22 10:15:30,647 INFO L78 Accepts]: Start accepts. Automaton has 13060 states and 18783 transitions. Word has length 93 [2020-12-22 10:15:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:30,647 INFO L481 AbstractCegarLoop]: Abstraction has 13060 states and 18783 transitions. [2020-12-22 10:15:30,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 13060 states and 18783 transitions. [2020-12-22 10:15:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:30,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:30,649 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 10:15:30,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:15:30,649 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:15:30,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:30,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570931317] [2020-12-22 10:15:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:30,963 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 10:15:30,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570931317] [2020-12-22 10:15:30,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:30,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144495750] [2020-12-22 10:15:30,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:30,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:30,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:30,966 INFO L87 Difference]: Start difference. First operand 13060 states and 18783 transitions. Second operand 9 states. [2020-12-22 10:15:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:31,961 INFO L93 Difference]: Finished difference Result 19304 states and 28257 transitions. [2020-12-22 10:15:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:31,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:15:31,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:31,983 INFO L225 Difference]: With dead ends: 19304 [2020-12-22 10:15:31,983 INFO L226 Difference]: Without dead ends: 13062 [2020-12-22 10:15:31,995 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 10:15:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13062 states. [2020-12-22 10:15:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13062 to 13060. [2020-12-22 10:15:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13060 states. [2020-12-22 10:15:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13060 states to 13060 states and 18719 transitions. [2020-12-22 10:15:32,469 INFO L78 Accepts]: Start accepts. Automaton has 13060 states and 18719 transitions. Word has length 93 [2020-12-22 10:15:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:32,469 INFO L481 AbstractCegarLoop]: Abstraction has 13060 states and 18719 transitions. [2020-12-22 10:15:32,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13060 states and 18719 transitions. [2020-12-22 10:15:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:15:32,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:32,471 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 10:15:32,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:15:32,472 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:32,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:15:32,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:32,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849192662] [2020-12-22 10:15:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:32,658 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 10:15:32,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849192662] [2020-12-22 10:15:32,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78939121] [2020-12-22 10:15:32,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:32,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:32,666 INFO L87 Difference]: Start difference. First operand 13060 states and 18719 transitions. Second operand 3 states. [2020-12-22 10:15:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:33,522 INFO L93 Difference]: Finished difference Result 24776 states and 36257 transitions. [2020-12-22 10:15:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:33,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:15:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:33,557 INFO L225 Difference]: With dead ends: 24776 [2020-12-22 10:15:33,557 INFO L226 Difference]: Without dead ends: 18534 [2020-12-22 10:15:33,573 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 10:15:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18534 states. [2020-12-22 10:15:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18534 to 18532. [2020-12-22 10:15:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18532 states. [2020-12-22 10:15:34,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18532 states to 18532 states and 26719 transitions. [2020-12-22 10:15:34,423 INFO L78 Accepts]: Start accepts. Automaton has 18532 states and 26719 transitions. Word has length 93 [2020-12-22 10:15:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:34,423 INFO L481 AbstractCegarLoop]: Abstraction has 18532 states and 26719 transitions. [2020-12-22 10:15:34,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 18532 states and 26719 transitions. [2020-12-22 10:15:34,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:15:34,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:34,425 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 10:15:34,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:15:34,425 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:15:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:34,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755529360] [2020-12-22 10:15:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:34,538 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 10:15:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755529360] [2020-12-22 10:15:34,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:34,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:15:34,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658014165] [2020-12-22 10:15:34,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:15:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:34,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:15:34,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:15:34,540 INFO L87 Difference]: Start difference. First operand 18532 states and 26719 transitions. Second operand 8 states. [2020-12-22 10:15:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:35,710 INFO L93 Difference]: Finished difference Result 27274 states and 39503 transitions. [2020-12-22 10:15:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:15:35,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:15:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:35,753 INFO L225 Difference]: With dead ends: 27274 [2020-12-22 10:15:35,754 INFO L226 Difference]: Without dead ends: 27272 [2020-12-22 10:15:35,765 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 10:15:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27272 states. [2020-12-22 10:15:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27272 to 18916. [2020-12-22 10:15:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18916 states. [2020-12-22 10:15:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18916 states to 18916 states and 27039 transitions. [2020-12-22 10:15:36,913 INFO L78 Accepts]: Start accepts. Automaton has 18916 states and 27039 transitions. Word has length 94 [2020-12-22 10:15:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:36,913 INFO L481 AbstractCegarLoop]: Abstraction has 18916 states and 27039 transitions. [2020-12-22 10:15:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:15:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18916 states and 27039 transitions. [2020-12-22 10:15:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:15:36,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:36,915 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 10:15:36,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:15:36,915 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:15:36,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:36,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391694924] [2020-12-22 10:15:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:36,977 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 10:15:36,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391694924] [2020-12-22 10:15:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:36,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:15:36,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647513256] [2020-12-22 10:15:36,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:15:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:15:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:15:36,979 INFO L87 Difference]: Start difference. First operand 18916 states and 27039 transitions. Second operand 3 states. [2020-12-22 10:15:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:38,296 INFO L93 Difference]: Finished difference Result 31211 states and 45221 transitions. [2020-12-22 10:15:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:15:38,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:15:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:38,326 INFO L225 Difference]: With dead ends: 31211 [2020-12-22 10:15:38,326 INFO L226 Difference]: Without dead ends: 24552 [2020-12-22 10:15:38,343 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 10:15:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24552 states. [2020-12-22 10:15:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24552 to 24550. [2020-12-22 10:15:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24550 states. [2020-12-22 10:15:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24550 states to 24550 states and 35169 transitions. [2020-12-22 10:15:39,580 INFO L78 Accepts]: Start accepts. Automaton has 24550 states and 35169 transitions. Word has length 95 [2020-12-22 10:15:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:39,580 INFO L481 AbstractCegarLoop]: Abstraction has 24550 states and 35169 transitions. [2020-12-22 10:15:39,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:15:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 24550 states and 35169 transitions. [2020-12-22 10:15:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:15:39,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:39,592 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 10:15:39,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:15:39,592 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:15:39,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:39,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534300836] [2020-12-22 10:15:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:39,773 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 10:15:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534300836] [2020-12-22 10:15:39,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:39,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:39,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123983072] [2020-12-22 10:15:39,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:39,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:39,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:39,778 INFO L87 Difference]: Start difference. First operand 24550 states and 35169 transitions. Second operand 9 states. [2020-12-22 10:15:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:46,600 INFO L93 Difference]: Finished difference Result 152118 states and 221033 transitions. [2020-12-22 10:15:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:46,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:15:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:46,906 INFO L225 Difference]: With dead ends: 152118 [2020-12-22 10:15:46,906 INFO L226 Difference]: Without dead ends: 134388 [2020-12-22 10:15:46,944 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 10:15:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134388 states. [2020-12-22 10:15:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134388 to 42278. [2020-12-22 10:15:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42278 states. [2020-12-22 10:15:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42278 states to 42278 states and 60833 transitions. [2020-12-22 10:15:50,425 INFO L78 Accepts]: Start accepts. Automaton has 42278 states and 60833 transitions. Word has length 129 [2020-12-22 10:15:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:15:50,425 INFO L481 AbstractCegarLoop]: Abstraction has 42278 states and 60833 transitions. [2020-12-22 10:15:50,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:15:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 42278 states and 60833 transitions. [2020-12-22 10:15:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:15:50,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:15:50,445 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 10:15:50,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:15:50,445 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:15:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:15:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:15:50,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:15:50,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565495878] [2020-12-22 10:15:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:15:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:15:50,616 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 10:15:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565495878] [2020-12-22 10:15:50,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:15:50,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:15:50,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050651028] [2020-12-22 10:15:50,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:15:50,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:15:50,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:15:50,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:15:50,619 INFO L87 Difference]: Start difference. First operand 42278 states and 60833 transitions. Second operand 9 states. [2020-12-22 10:15:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:15:59,505 INFO L93 Difference]: Finished difference Result 169846 states and 246697 transitions. [2020-12-22 10:15:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:15:59,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:15:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:15:59,859 INFO L225 Difference]: With dead ends: 169846 [2020-12-22 10:15:59,859 INFO L226 Difference]: Without dead ends: 152116 [2020-12-22 10:15:59,899 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 10:15:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152116 states. [2020-12-22 10:16:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152116 to 68902. [2020-12-22 10:16:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68902 states. [2020-12-22 10:16:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68902 states to 68902 states and 99169 transitions. [2020-12-22 10:16:05,270 INFO L78 Accepts]: Start accepts. Automaton has 68902 states and 99169 transitions. Word has length 129 [2020-12-22 10:16:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:05,271 INFO L481 AbstractCegarLoop]: Abstraction has 68902 states and 99169 transitions. [2020-12-22 10:16:05,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 68902 states and 99169 transitions. [2020-12-22 10:16:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:05,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:05,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:05,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:16:05,286 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:05,287 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:16:05,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:05,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540280558] [2020-12-22 10:16:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:05,467 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 10:16:05,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540280558] [2020-12-22 10:16:05,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:05,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836256514] [2020-12-22 10:16:05,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:05,472 INFO L87 Difference]: Start difference. First operand 68902 states and 99169 transitions. Second operand 9 states. [2020-12-22 10:16:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:16,033 INFO L93 Difference]: Finished difference Result 187574 states and 272361 transitions. [2020-12-22 10:16:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:16,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:16,423 INFO L225 Difference]: With dead ends: 187574 [2020-12-22 10:16:16,423 INFO L226 Difference]: Without dead ends: 169844 [2020-12-22 10:16:16,460 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 10:16:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169844 states. [2020-12-22 10:16:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169844 to 86630. [2020-12-22 10:16:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86630 states. [2020-12-22 10:16:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86630 states to 86630 states and 124833 transitions. [2020-12-22 10:16:23,090 INFO L78 Accepts]: Start accepts. Automaton has 86630 states and 124833 transitions. Word has length 129 [2020-12-22 10:16:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:23,090 INFO L481 AbstractCegarLoop]: Abstraction has 86630 states and 124833 transitions. [2020-12-22 10:16:23,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 86630 states and 124833 transitions. [2020-12-22 10:16:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:23,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:23,106 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 10:16:23,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:16:23,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:16:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255521306] [2020-12-22 10:16:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:23,283 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 10:16:23,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255521306] [2020-12-22 10:16:23,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:23,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:23,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98413467] [2020-12-22 10:16:23,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:23,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:23,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:23,287 INFO L87 Difference]: Start difference. First operand 86630 states and 124833 transitions. Second operand 9 states. [2020-12-22 10:16:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:16:36,727 INFO L93 Difference]: Finished difference Result 205302 states and 298025 transitions. [2020-12-22 10:16:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:16:36,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:16:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:16:36,998 INFO L225 Difference]: With dead ends: 205302 [2020-12-22 10:16:36,999 INFO L226 Difference]: Without dead ends: 187572 [2020-12-22 10:16:37,280 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 10:16:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187572 states. [2020-12-22 10:16:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187572 to 104358. [2020-12-22 10:16:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104358 states. [2020-12-22 10:16:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104358 states to 104358 states and 150497 transitions. [2020-12-22 10:16:46,081 INFO L78 Accepts]: Start accepts. Automaton has 104358 states and 150497 transitions. Word has length 129 [2020-12-22 10:16:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:16:46,081 INFO L481 AbstractCegarLoop]: Abstraction has 104358 states and 150497 transitions. [2020-12-22 10:16:46,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:16:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 104358 states and 150497 transitions. [2020-12-22 10:16:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:16:46,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:16:46,297 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 10:16:46,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:16:46,297 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:16:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:16:46,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:16:46,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:16:46,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889713388] [2020-12-22 10:16:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:16:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:16:46,494 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 10:16:46,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889713388] [2020-12-22 10:16:46,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:16:46,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:16:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060405811] [2020-12-22 10:16:46,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:16:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:16:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:16:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:16:46,496 INFO L87 Difference]: Start difference. First operand 104358 states and 150497 transitions. Second operand 9 states. [2020-12-22 10:17:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:02,408 INFO L93 Difference]: Finished difference Result 223030 states and 323689 transitions. [2020-12-22 10:17:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:02,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:02,911 INFO L225 Difference]: With dead ends: 223030 [2020-12-22 10:17:02,911 INFO L226 Difference]: Without dead ends: 205300 [2020-12-22 10:17:02,989 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 10:17:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205300 states. [2020-12-22 10:17:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205300 to 122086. [2020-12-22 10:17:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122086 states. [2020-12-22 10:17:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122086 states to 122086 states and 176161 transitions. [2020-12-22 10:17:13,779 INFO L78 Accepts]: Start accepts. Automaton has 122086 states and 176161 transitions. Word has length 129 [2020-12-22 10:17:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:13,780 INFO L481 AbstractCegarLoop]: Abstraction has 122086 states and 176161 transitions. [2020-12-22 10:17:13,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 122086 states and 176161 transitions. [2020-12-22 10:17:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:17:13,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:13,793 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 10:17:13,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:17:13,793 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:13,794 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:17:13,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:13,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961008731] [2020-12-22 10:17:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:13,957 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 10:17:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961008731] [2020-12-22 10:17:13,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:13,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:17:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410306053] [2020-12-22 10:17:13,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:17:13,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:17:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:17:13,959 INFO L87 Difference]: Start difference. First operand 122086 states and 176161 transitions. Second operand 9 states. [2020-12-22 10:17:14,303 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-22 10:17:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:33,441 INFO L93 Difference]: Finished difference Result 240758 states and 349353 transitions. [2020-12-22 10:17:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:17:33,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:17:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:33,963 INFO L225 Difference]: With dead ends: 240758 [2020-12-22 10:17:33,963 INFO L226 Difference]: Without dead ends: 223028 [2020-12-22 10:17:34,014 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 10:17:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223028 states. [2020-12-22 10:17:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223028 to 139814. [2020-12-22 10:17:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139814 states. [2020-12-22 10:17:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139814 states to 139814 states and 201825 transitions. [2020-12-22 10:17:47,678 INFO L78 Accepts]: Start accepts. Automaton has 139814 states and 201825 transitions. Word has length 129 [2020-12-22 10:17:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:17:47,678 INFO L481 AbstractCegarLoop]: Abstraction has 139814 states and 201825 transitions. [2020-12-22 10:17:47,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:17:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 139814 states and 201825 transitions. [2020-12-22 10:17:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:17:47,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:17:47,696 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 10:17:47,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:17:47,697 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:17:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:17:47,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:17:47,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:17:47,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843691410] [2020-12-22 10:17:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:17:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:17:47,787 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 10:17:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843691410] [2020-12-22 10:17:47,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:17:47,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:17:47,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167653620] [2020-12-22 10:17:47,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:17:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:17:47,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:17:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:17:47,789 INFO L87 Difference]: Start difference. First operand 139814 states and 201825 transitions. Second operand 3 states. [2020-12-22 10:17:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:17:57,013 INFO L93 Difference]: Finished difference Result 232015 states and 336272 transitions. [2020-12-22 10:17:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:17:57,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:17:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:17:57,164 INFO L225 Difference]: With dead ends: 232015 [2020-12-22 10:17:57,164 INFO L226 Difference]: Without dead ends: 99021 [2020-12-22 10:17:57,429 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 10:17:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99021 states. [2020-12-22 10:18:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99021 to 99019. [2020-12-22 10:18:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99019 states. [2020-12-22 10:18:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99019 states to 99019 states and 142797 transitions. [2020-12-22 10:18:06,388 INFO L78 Accepts]: Start accepts. Automaton has 99019 states and 142797 transitions. Word has length 131 [2020-12-22 10:18:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:06,388 INFO L481 AbstractCegarLoop]: Abstraction has 99019 states and 142797 transitions. [2020-12-22 10:18:06,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 99019 states and 142797 transitions. [2020-12-22 10:18:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:18:06,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:06,399 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 10:18:06,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:18:06,399 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:06,399 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:18:06,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:06,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859187272] [2020-12-22 10:18:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:06,763 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 10:18:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859187272] [2020-12-22 10:18:06,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:06,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:18:06,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044802886] [2020-12-22 10:18:06,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:18:06,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:18:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:18:06,770 INFO L87 Difference]: Start difference. First operand 99019 states and 142797 transitions. Second operand 9 states. [2020-12-22 10:18:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:23,561 INFO L93 Difference]: Finished difference Result 185051 states and 268245 transitions. [2020-12-22 10:18:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:18:23,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:18:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:23,798 INFO L225 Difference]: With dead ends: 185051 [2020-12-22 10:18:23,798 INFO L226 Difference]: Without dead ends: 172761 [2020-12-22 10:18:23,840 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 10:18:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172761 states. [2020-12-22 10:18:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172761 to 111307. [2020-12-22 10:18:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111307 states. [2020-12-22 10:18:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111307 states to 111307 states and 160589 transitions. [2020-12-22 10:18:35,242 INFO L78 Accepts]: Start accepts. Automaton has 111307 states and 160589 transitions. Word has length 131 [2020-12-22 10:18:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:35,243 INFO L481 AbstractCegarLoop]: Abstraction has 111307 states and 160589 transitions. [2020-12-22 10:18:35,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:18:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 111307 states and 160589 transitions. [2020-12-22 10:18:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:18:35,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:35,258 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 10:18:35,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:18:35,258 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:18:35,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:35,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332408394] [2020-12-22 10:18:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:35,365 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 10:18:35,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332408394] [2020-12-22 10:18:35,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:18:35,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:18:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966366627] [2020-12-22 10:18:35,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:18:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:18:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:18:35,371 INFO L87 Difference]: Start difference. First operand 111307 states and 160589 transitions. Second operand 3 states. [2020-12-22 10:18:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:18:41,051 INFO L93 Difference]: Finished difference Result 163535 states and 236207 transitions. [2020-12-22 10:18:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:18:41,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:18:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:18:41,114 INFO L225 Difference]: With dead ends: 163535 [2020-12-22 10:18:41,114 INFO L226 Difference]: Without dead ends: 59085 [2020-12-22 10:18:41,160 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 10:18:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59085 states. [2020-12-22 10:18:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59085 to 59083. [2020-12-22 10:18:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59083 states. [2020-12-22 10:18:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59083 states to 59083 states and 84429 transitions. [2020-12-22 10:18:46,812 INFO L78 Accepts]: Start accepts. Automaton has 59083 states and 84429 transitions. Word has length 132 [2020-12-22 10:18:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:18:46,812 INFO L481 AbstractCegarLoop]: Abstraction has 59083 states and 84429 transitions. [2020-12-22 10:18:46,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:18:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 59083 states and 84429 transitions. [2020-12-22 10:18:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:18:46,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:18:46,819 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 10:18:46,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 10:18:46,819 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:18:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:18:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1811184295, now seen corresponding path program 1 times [2020-12-22 10:18:46,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:18:46,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134189592] [2020-12-22 10:18:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:18:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:47,380 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 10:18:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134189592] [2020-12-22 10:18:47,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690744009] [2020-12-22 10:18:47,381 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 10:18:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:18:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:18:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:18:48,001 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 10:18:48,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:18:48,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 10:18:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947990018] [2020-12-22 10:18:48,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:18:48,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:18:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:18:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:18:48,004 INFO L87 Difference]: Start difference. First operand 59083 states and 84429 transitions. Second operand 12 states.