/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:44:58,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:44:58,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:44:58,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:44:58,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:44:58,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:44:58,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:44:58,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:44:58,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:44:58,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:44:58,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:44:58,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:44:58,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:44:58,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:44:58,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:44:58,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:44:58,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:44:58,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:44:58,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:44:58,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:44:58,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:44:58,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:44:58,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:44:58,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:44:58,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:44:58,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:44:58,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:44:58,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:44:58,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:44:58,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:44:58,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:44:58,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:44:58,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:44:58,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:44:58,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:44:58,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:44:58,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:44:58,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:44:58,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:44:58,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:44:58,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:44:58,249 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:44:58,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:44:58,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:44:58,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:44:58,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:44:58,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:44:58,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:44:58,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:44:58,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:44:58,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:44:58,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:44:58,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:44:58,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:44:58,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:44:58,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:44:58,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:44:58,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:44:58,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:44:58,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:44:58,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:44:58,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:44:58,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:44:58,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:44:58,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:44:58,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:44:58,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:44:58,679 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:44:58,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:44:58,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e4dc578/11a89e934703423b93afe32bbf76e884/FLAG78f27277b [2020-12-22 09:44:59,868 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:44:59,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:44:59,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e4dc578/11a89e934703423b93afe32bbf76e884/FLAG78f27277b [2020-12-22 09:45:00,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e4dc578/11a89e934703423b93afe32bbf76e884 [2020-12-22 09:45:00,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:00,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:00,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:00,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:00,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:00,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:00" (1/1) ... [2020-12-22 09:45:00,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689989bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:00, skipping insertion in model container [2020-12-22 09:45:00,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:00" (1/1) ... [2020-12-22 09:45:00,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:00,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:00,868 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c[8688,8701] [2020-12-22 09:45:00,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c[15506,15519] [2020-12-22 09:45:01,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:01,945 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:45:02,018 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c[8688,8701] [2020-12-22 09:45:02,039 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c[15506,15519] [2020-12-22 09:45:02,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:02,795 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:45:02,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02 WrapperNode [2020-12-22 09:45:02,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:02,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:02,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:45:02,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:45:02,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:02,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:03,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:03,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:45:03,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:45:03,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:45:03,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:03,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:03,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:03,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:04,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:04,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:04,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... [2020-12-22 09:45:04,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:45:04,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:45:04,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:45:04,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:45:04,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:45:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:45:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:45:04,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:45:11,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:45:11,234 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:45:11,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:11 BoogieIcfgContainer [2020-12-22 09:45:11,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:45:11,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:45:11,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:45:11,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:45:11,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:00" (1/3) ... [2020-12-22 09:45:11,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90e1ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:11, skipping insertion in model container [2020-12-22 09:45:11,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:02" (2/3) ... [2020-12-22 09:45:11,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90e1ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:11, skipping insertion in model container [2020-12-22 09:45:11,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:11" (3/3) ... [2020-12-22 09:45:11,257 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label04.c [2020-12-22 09:45:11,267 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:45:11,276 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:45:11,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:45:11,363 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:45:11,364 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:45:11,364 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:45:11,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:45:11,364 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:45:11,364 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:45:11,364 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:45:11,364 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:45:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:45:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:11,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:11,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:11,437 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:45:11,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:11,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708683833] [2020-12-22 09:45:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:11,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708683833] [2020-12-22 09:45:11,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:11,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872266345] [2020-12-22 09:45:11,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:45:11,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:45:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:45:11,782 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:45:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:11,887 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:45:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:45:11,889 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:45:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:11,940 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:45:11,940 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:45:11,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:45:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:45:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:45:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:45:12,105 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:45:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:12,106 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:45:12,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:45:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:45:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:12,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:12,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:12,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:45:12,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:12,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:45:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:12,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129064697] [2020-12-22 09:45:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:12,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129064697] [2020-12-22 09:45:12,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:12,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870421112] [2020-12-22 09:45:12,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:12,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:12,410 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:45:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:12,603 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:45:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:12,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:45:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:12,611 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:45:12,611 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:45:12,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:45:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:45:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:45:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:45:12,652 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:45:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:12,652 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:45:12,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:45:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:12,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:12,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:12,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:45:12,666 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:12,669 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:45:12,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283393470] [2020-12-22 09:45:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:12,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283393470] [2020-12-22 09:45:12,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:12,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:12,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888812667] [2020-12-22 09:45:12,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:12,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:12,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:12,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:12,853 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:45:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:12,908 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:45:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:12,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:12,921 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:45:12,923 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:45:12,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:45:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:45:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:45:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:45:12,974 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:45:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:12,975 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:45:12,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:45:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:12,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:12,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:12,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:45:12,983 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:12,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:45:12,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:12,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339412272] [2020-12-22 09:45:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:13,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339412272] [2020-12-22 09:45:13,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:13,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094877859] [2020-12-22 09:45:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,125 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:45:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:13,178 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:45:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:13,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:13,187 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:45:13,187 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:45:13,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:45:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:45:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:45:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:45:13,224 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:45:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:13,225 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:45:13,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:45:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:13,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:13,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:13,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:45:13,228 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:45:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:13,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745865899] [2020-12-22 09:45:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:13,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745865899] [2020-12-22 09:45:13,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:13,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641928365] [2020-12-22 09:45:13,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:13,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,379 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:45:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:13,458 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:45:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:13,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:13,469 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:45:13,470 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:45:13,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:45:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:45:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:45:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:45:13,534 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:45:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:13,535 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:45:13,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:45:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:13,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:13,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:13,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:45:13,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:13,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:45:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:13,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478119475] [2020-12-22 09:45:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478119475] [2020-12-22 09:45:13,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:13,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:13,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352722840] [2020-12-22 09:45:13,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,699 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:45:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:13,760 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:45:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:13,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:13,771 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:45:13,772 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:45:13,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:45:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:45:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:45:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:45:13,831 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:45:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:13,833 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:45:13,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:45:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:13,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:13,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:13,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:45:13,842 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:45:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:13,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368161738] [2020-12-22 09:45:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:13,963 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 09:45:13,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368161738] [2020-12-22 09:45:13,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:13,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:13,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408661398] [2020-12-22 09:45:13,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:13,967 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:45:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:14,471 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:45:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:45:14,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:45:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:14,502 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:45:14,502 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:45:14,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:45:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:45:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:45:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:45:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:45:14,651 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:45:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:14,651 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:45:14,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:45:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:14,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:14,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:14,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:45:14,653 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:45:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:14,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679224078] [2020-12-22 09:45:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:14,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679224078] [2020-12-22 09:45:14,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:14,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979552938] [2020-12-22 09:45:14,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:14,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:14,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:14,743 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:45:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:14,854 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:45:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:14,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:45:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:14,869 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:45:14,870 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:45:14,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:45:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:45:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:45:14,981 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2020-12-22 09:45:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:14,984 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2020-12-22 09:45:14,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:45:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:14,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:14,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:14,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:45:14,986 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:14,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:45:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:14,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379765634] [2020-12-22 09:45:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379765634] [2020-12-22 09:45:15,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:15,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:15,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3183635] [2020-12-22 09:45:15,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:15,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:15,229 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:45:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:15,498 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:45:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:15,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:45:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:15,512 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:45:15,512 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:45:15,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:45:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:45:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:45:15,631 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:45:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:15,631 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:45:15,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:45:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:15,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:15,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:15,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:45:15,633 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:45:15,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:15,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185266743] [2020-12-22 09:45:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:15,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185266743] [2020-12-22 09:45:15,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:15,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:15,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160713204] [2020-12-22 09:45:15,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:15,726 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:45:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:15,996 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:45:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:15,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:16,010 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:45:16,010 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:45:16,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:45:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:45:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:45:16,253 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:45:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:16,253 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:45:16,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:45:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:16,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:16,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:16,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:45:16,256 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:45:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:16,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811718691] [2020-12-22 09:45:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811718691] [2020-12-22 09:45:16,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:16,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:16,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926433979] [2020-12-22 09:45:16,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:16,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:16,363 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:45:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:16,668 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:45:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:16,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:16,683 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:45:16,683 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:45:16,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:45:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:45:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:16,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:45:16,843 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:45:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:16,843 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:45:16,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:45:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:16,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:16,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:16,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:45:16,845 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:16,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:45:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:16,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316091324] [2020-12-22 09:45:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:16,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316091324] [2020-12-22 09:45:16,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:16,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639666159] [2020-12-22 09:45:16,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:16,971 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:45:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:17,309 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:45:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:45:17,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:45:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:17,331 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:45:17,331 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:45:17,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:45:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:45:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:45:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:45:17,531 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:45:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:17,532 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:45:17,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:45:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:45:17,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:17,534 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] [2020-12-22 09:45:17,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:45:17,534 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1641000780, now seen corresponding path program 1 times [2020-12-22 09:45:17,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:17,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121394974] [2020-12-22 09:45:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121394974] [2020-12-22 09:45:17,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:17,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550548116] [2020-12-22 09:45:17,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:45:17,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:45:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:45:17,649 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:45:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:30,148 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:45:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:45:30,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:45:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:30,199 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:45:30,199 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:45:30,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:45:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:45:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:45:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5673 transitions. [2020-12-22 09:45:30,471 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5673 transitions. Word has length 61 [2020-12-22 09:45:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:30,472 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5673 transitions. [2020-12-22 09:45:30,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:45:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5673 transitions. [2020-12-22 09:45:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:30,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:30,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:30,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:45:30,475 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:45:30,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:30,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999492012] [2020-12-22 09:45:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:45:30,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999492012] [2020-12-22 09:45:30,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:30,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:30,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140269163] [2020-12-22 09:45:30,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:30,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:30,583 INFO L87 Difference]: Start difference. First operand 3785 states and 5673 transitions. Second operand 6 states. [2020-12-22 09:45:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:31,069 INFO L93 Difference]: Finished difference Result 10091 states and 14442 transitions. [2020-12-22 09:45:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:31,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:31,092 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:45:31,093 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:45:31,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:45:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:45:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:45:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7737 transitions. [2020-12-22 09:45:31,424 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7737 transitions. Word has length 79 [2020-12-22 09:45:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:31,424 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7737 transitions. [2020-12-22 09:45:31,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7737 transitions. [2020-12-22 09:45:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:31,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:31,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:31,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:31,427 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:45:31,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:31,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950363993] [2020-12-22 09:45:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:45:31,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950363993] [2020-12-22 09:45:31,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:31,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:31,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134243123] [2020-12-22 09:45:31,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:31,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:31,534 INFO L87 Difference]: Start difference. First operand 5281 states and 7737 transitions. Second operand 6 states. [2020-12-22 09:45:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:32,220 INFO L93 Difference]: Finished difference Result 11587 states and 16506 transitions. [2020-12-22 09:45:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:32,221 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:32,246 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:45:32,246 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:45:32,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:45:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:45:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:45:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10813 transitions. [2020-12-22 09:45:32,785 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10813 transitions. Word has length 79 [2020-12-22 09:45:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:32,785 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10813 transitions. [2020-12-22 09:45:32,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10813 transitions. [2020-12-22 09:45:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:32,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:32,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:32,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:32,788 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:45:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:32,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655059194] [2020-12-22 09:45:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:45:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655059194] [2020-12-22 09:45:32,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:32,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:32,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956997905] [2020-12-22 09:45:32,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:32,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:32,897 INFO L87 Difference]: Start difference. First operand 7529 states and 10813 transitions. Second operand 6 states. [2020-12-22 09:45:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,634 INFO L93 Difference]: Finished difference Result 13083 states and 18570 transitions. [2020-12-22 09:45:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:33,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,667 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:45:33,667 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:45:33,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:45:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:45:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:45:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12877 transitions. [2020-12-22 09:45:34,342 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12877 transitions. Word has length 79 [2020-12-22 09:45:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,342 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12877 transitions. [2020-12-22 09:45:34,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12877 transitions. [2020-12-22 09:45:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:34,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:34,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:34,347 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:45:34,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799771492] [2020-12-22 09:45:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:34,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799771492] [2020-12-22 09:45:34,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:34,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979554078] [2020-12-22 09:45:34,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:34,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:34,459 INFO L87 Difference]: Start difference. First operand 9025 states and 12877 transitions. Second operand 6 states. [2020-12-22 09:45:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,261 INFO L93 Difference]: Finished difference Result 13699 states and 19434 transitions. [2020-12-22 09:45:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:35,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,293 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:45:35,294 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:45:35,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:45:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:45:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:45:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14349 transitions. [2020-12-22 09:45:35,923 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14349 transitions. Word has length 79 [2020-12-22 09:45:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:35,924 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14349 transitions. [2020-12-22 09:45:35,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14349 transitions. [2020-12-22 09:45:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:35,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:35,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:35,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:45:35,927 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:45:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:35,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984180416] [2020-12-22 09:45:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,209 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 13 [2020-12-22 09:45:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:36,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984180416] [2020-12-22 09:45:36,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052036753] [2020-12-22 09:45:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:36,927 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:37,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:37,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:45:37,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590625334] [2020-12-22 09:45:37,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:45:37,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:45:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:45:37,525 INFO L87 Difference]: Start difference. First operand 10081 states and 14349 transitions. Second operand 18 states. [2020-12-22 09:45:37,676 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:37,940 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:45:38,083 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:45:38,227 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:38,807 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:45:39,660 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:40,090 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:40,300 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:40,530 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:40,681 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:42,037 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:42,180 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:42,326 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:42,788 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:42,935 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:43,100 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:44,435 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:44,573 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:44,737 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:45,115 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:46,018 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:46,278 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:46,446 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:46,615 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:47,542 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:49,168 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:49,797 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:49,963 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:50,435 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:50,830 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:51,239 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:51,958 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:53,396 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:54,072 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:54,492 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:58,600 INFO L93 Difference]: Finished difference Result 86701 states and 118444 transitions. [2020-12-22 09:45:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:45:58,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:45:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:58,783 INFO L225 Difference]: With dead ends: 86701 [2020-12-22 09:45:58,783 INFO L226 Difference]: Without dead ends: 78907 [2020-12-22 09:45:58,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:45:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78907 states. [2020-12-22 09:46:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78907 to 36697. [2020-12-22 09:46:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36697 states. [2020-12-22 09:46:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36697 states to 36697 states and 50867 transitions. [2020-12-22 09:46:02,631 INFO L78 Accepts]: Start accepts. Automaton has 36697 states and 50867 transitions. Word has length 80 [2020-12-22 09:46:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:02,631 INFO L481 AbstractCegarLoop]: Abstraction has 36697 states and 50867 transitions. [2020-12-22 09:46:02,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 36697 states and 50867 transitions. [2020-12-22 09:46:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:02,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:02,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:02,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:46:02,852 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:02,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248530360] [2020-12-22 09:46:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:02,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248530360] [2020-12-22 09:46:02,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:02,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:02,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632508795] [2020-12-22 09:46:02,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:02,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:02,918 INFO L87 Difference]: Start difference. First operand 36697 states and 50867 transitions. Second operand 3 states. [2020-12-22 09:46:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:06,005 INFO L93 Difference]: Finished difference Result 71109 states and 98151 transitions. [2020-12-22 09:46:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:06,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:06,078 INFO L225 Difference]: With dead ends: 71109 [2020-12-22 09:46:06,079 INFO L226 Difference]: Without dead ends: 36699 [2020-12-22 09:46:06,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36699 states. [2020-12-22 09:46:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36699 to 35737. [2020-12-22 09:46:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35737 states. [2020-12-22 09:46:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35737 states to 35737 states and 48827 transitions. [2020-12-22 09:46:09,420 INFO L78 Accepts]: Start accepts. Automaton has 35737 states and 48827 transitions. Word has length 81 [2020-12-22 09:46:09,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:09,421 INFO L481 AbstractCegarLoop]: Abstraction has 35737 states and 48827 transitions. [2020-12-22 09:46:09,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 35737 states and 48827 transitions. [2020-12-22 09:46:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:09,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:09,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:09,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:46:09,426 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:46:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:09,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984301110] [2020-12-22 09:46:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984301110] [2020-12-22 09:46:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049987976] [2020-12-22 09:46:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:10,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:10,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:10,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:46:10,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738276049] [2020-12-22 09:46:10,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:46:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:46:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:46:10,435 INFO L87 Difference]: Start difference. First operand 35737 states and 48827 transitions. Second operand 19 states. [2020-12-22 09:46:10,604 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:10,739 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:46:10,903 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:11,056 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:46:11,224 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:11,773 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:12,920 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:13,193 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:13,446 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:13,708 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:14,387 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:18,173 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:18,481 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:18,618 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:19,050 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:19,256 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:46:19,759 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:20,018 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:20,367 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:20,736 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:21,265 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:21,831 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:22,330 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:24,391 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:24,756 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:30,365 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:30,844 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:31,021 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:31,682 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:32,002 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:32,621 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:32,884 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:33,074 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:42,251 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:42,854 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:47,002 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:47,461 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:52,465 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:57,933 INFO L93 Difference]: Finished difference Result 372820 states and 496097 transitions. [2020-12-22 09:46:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:46:57,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:46:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:58,866 INFO L225 Difference]: With dead ends: 372820 [2020-12-22 09:46:58,866 INFO L226 Difference]: Without dead ends: 339370 [2020-12-22 09:46:59,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:46:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339370 states. [2020-12-22 09:47:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339370 to 167235. [2020-12-22 09:47:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167235 states. [2020-12-22 09:47:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167235 states to 167235 states and 224947 transitions. [2020-12-22 09:47:17,132 INFO L78 Accepts]: Start accepts. Automaton has 167235 states and 224947 transitions. Word has length 81 [2020-12-22 09:47:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:17,132 INFO L481 AbstractCegarLoop]: Abstraction has 167235 states and 224947 transitions. [2020-12-22 09:47:17,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:47:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 167235 states and 224947 transitions. [2020-12-22 09:47:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:17,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:17,140 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] [2020-12-22 09:47:17,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:17,355 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:47:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:17,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550140091] [2020-12-22 09:47:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:17,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550140091] [2020-12-22 09:47:17,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:17,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333527360] [2020-12-22 09:47:17,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:17,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:17,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:17,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:17,752 INFO L87 Difference]: Start difference. First operand 167235 states and 224947 transitions. Second operand 3 states. [2020-12-22 09:47:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:27,083 INFO L93 Difference]: Finished difference Result 258799 states and 347463 transitions. [2020-12-22 09:47:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:27,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:27,227 INFO L225 Difference]: With dead ends: 258799 [2020-12-22 09:47:27,227 INFO L226 Difference]: Without dead ends: 93851 [2020-12-22 09:47:27,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93851 states. [2020-12-22 09:47:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93851 to 93849. [2020-12-22 09:47:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-22 09:47:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 124403 transitions. [2020-12-22 09:47:36,167 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 124403 transitions. Word has length 81 [2020-12-22 09:47:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:36,167 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 124403 transitions. [2020-12-22 09:47:36,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 124403 transitions. [2020-12-22 09:47:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:36,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:36,173 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] [2020-12-22 09:47:36,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:47:36,173 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:47:36,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:36,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346897406] [2020-12-22 09:47:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:36,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346897406] [2020-12-22 09:47:36,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:36,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91964702] [2020-12-22 09:47:36,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:36,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:36,255 INFO L87 Difference]: Start difference. First operand 93849 states and 124403 transitions. Second operand 3 states. [2020-12-22 09:47:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:40,644 INFO L93 Difference]: Finished difference Result 135830 states and 180271 transitions. [2020-12-22 09:47:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:40,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:40,700 INFO L225 Difference]: With dead ends: 135830 [2020-12-22 09:47:40,700 INFO L226 Difference]: Without dead ends: 44268 [2020-12-22 09:47:40,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44268 states. [2020-12-22 09:47:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44268 to 44242. [2020-12-22 09:47:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44242 states. [2020-12-22 09:47:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44242 states to 44242 states and 58631 transitions. [2020-12-22 09:47:44,765 INFO L78 Accepts]: Start accepts. Automaton has 44242 states and 58631 transitions. Word has length 81 [2020-12-22 09:47:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:44,765 INFO L481 AbstractCegarLoop]: Abstraction has 44242 states and 58631 transitions. [2020-12-22 09:47:44,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 44242 states and 58631 transitions. [2020-12-22 09:47:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:44,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:44,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:44,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:44,770 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:47:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:44,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10223989] [2020-12-22 09:47:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:47:44,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10223989] [2020-12-22 09:47:44,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:44,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:44,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227390465] [2020-12-22 09:47:44,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:44,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:44,848 INFO L87 Difference]: Start difference. First operand 44242 states and 58631 transitions. Second operand 6 states. [2020-12-22 09:47:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:47,519 INFO L93 Difference]: Finished difference Result 67564 states and 89201 transitions. [2020-12-22 09:47:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:47,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:47,547 INFO L225 Difference]: With dead ends: 67564 [2020-12-22 09:47:47,547 INFO L226 Difference]: Without dead ends: 25646 [2020-12-22 09:47:47,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25646 states. [2020-12-22 09:47:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25646 to 25646. [2020-12-22 09:47:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25646 states. [2020-12-22 09:47:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 33796 transitions. [2020-12-22 09:47:49,876 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 33796 transitions. Word has length 81 [2020-12-22 09:47:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:49,882 INFO L481 AbstractCegarLoop]: Abstraction has 25646 states and 33796 transitions. [2020-12-22 09:47:49,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 33796 transitions. [2020-12-22 09:47:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:49,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:49,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:49,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:49,886 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:49,886 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:49,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739585166] [2020-12-22 09:47:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:47:49,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739585166] [2020-12-22 09:47:49,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:49,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142254416] [2020-12-22 09:47:49,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:49,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:49,962 INFO L87 Difference]: Start difference. First operand 25646 states and 33796 transitions. Second operand 6 states. [2020-12-22 09:47:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:52,147 INFO L93 Difference]: Finished difference Result 44216 states and 57931 transitions. [2020-12-22 09:47:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:52,148 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:52,172 INFO L225 Difference]: With dead ends: 44216 [2020-12-22 09:47:52,173 INFO L226 Difference]: Without dead ends: 20876 [2020-12-22 09:47:52,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2020-12-22 09:47:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 20876. [2020-12-22 09:47:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-12-22 09:47:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 27474 transitions. [2020-12-22 09:47:54,096 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 27474 transitions. Word has length 81 [2020-12-22 09:47:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:54,096 INFO L481 AbstractCegarLoop]: Abstraction has 20876 states and 27474 transitions. [2020-12-22 09:47:54,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:54,096 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 27474 transitions. [2020-12-22 09:47:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:54,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:54,103 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:54,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:47:54,103 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:47:54,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:54,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170695056] [2020-12-22 09:47:54,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:54,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170695056] [2020-12-22 09:47:54,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:54,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524905697] [2020-12-22 09:47:54,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:54,199 INFO L87 Difference]: Start difference. First operand 20876 states and 27474 transitions. Second operand 3 states. [2020-12-22 09:47:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:55,391 INFO L93 Difference]: Finished difference Result 30252 states and 39444 transitions. [2020-12-22 09:47:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:55,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:47:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:55,407 INFO L225 Difference]: With dead ends: 30252 [2020-12-22 09:47:55,407 INFO L226 Difference]: Without dead ends: 11682 [2020-12-22 09:47:55,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2020-12-22 09:47:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 11680. [2020-12-22 09:47:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-12-22 09:47:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 15396 transitions. [2020-12-22 09:47:56,466 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 15396 transitions. Word has length 82 [2020-12-22 09:47:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:56,466 INFO L481 AbstractCegarLoop]: Abstraction has 11680 states and 15396 transitions. [2020-12-22 09:47:56,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 15396 transitions. [2020-12-22 09:47:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:56,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:56,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:56,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:47:56,470 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:47:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:56,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103520960] [2020-12-22 09:47:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:57,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103520960] [2020-12-22 09:47:57,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507474455] [2020-12-22 09:47:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:47:57,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:58,278 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:47:58,972 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:47:59,537 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:47:59,772 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:00,085 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:00,103 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:00,483 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:00,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:00,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:00,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:00,811 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:00,812 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:00,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:00,819 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:00,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:01,795 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:02,281 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:48:02,700 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:48:02,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:03,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:06,452 WARN L197 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:48:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:06,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:06,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:48:06,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107869654] [2020-12-22 09:48:06,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:48:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:48:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:48:06,996 INFO L87 Difference]: Start difference. First operand 11680 states and 15396 transitions. Second operand 39 states. [2020-12-22 09:48:08,649 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:48:08,856 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:48:09,115 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:48:09,458 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:48:09,968 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:48:10,374 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:48:10,785 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:48:11,220 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:48:11,700 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:48:12,228 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:48:12,735 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:48:13,330 WARN L197 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:48:13,845 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:48:14,489 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:48:15,225 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:48:16,557 WARN L197 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:48:17,282 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:48:18,474 WARN L197 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:48:19,295 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:48:19,934 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:48:20,465 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:48:20,699 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:21,415 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:48:21,906 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:48:22,334 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:48:22,677 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:24,278 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:48:24,544 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:25,012 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:26,265 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:48:26,924 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:48:27,417 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:48:27,822 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:48:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,027 INFO L93 Difference]: Finished difference Result 25221 states and 32025 transitions. [2020-12-22 09:48:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:48:32,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:48:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,050 INFO L225 Difference]: With dead ends: 25221 [2020-12-22 09:48:32,050 INFO L226 Difference]: Without dead ends: 21811 [2020-12-22 09:48:32,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:48:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21811 states. [2020-12-22 09:48:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21811 to 11132. [2020-12-22 09:48:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11132 states. [2020-12-22 09:48:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 14668 transitions. [2020-12-22 09:48:33,188 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 14668 transitions. Word has length 83 [2020-12-22 09:48:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:33,188 INFO L481 AbstractCegarLoop]: Abstraction has 11132 states and 14668 transitions. [2020-12-22 09:48:33,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:48:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 14668 transitions. [2020-12-22 09:48:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:33,190 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:48:33,406 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:33,407 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:48:33,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:33,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441446831] [2020-12-22 09:48:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,898 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441446831] [2020-12-22 09:48:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058412223] [2020-12-22 09:48:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:34,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:48:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:35,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:35,750 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:48:36,129 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:36,375 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:36,734 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:48:36,747 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:37,139 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:48:37,480 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:37,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:37,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:37,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:37,914 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:48:38,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:38,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:38,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:38,176 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:38,811 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:48:39,504 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:48:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:39,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:39,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:48:39,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995001278] [2020-12-22 09:48:39,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:48:39,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:39,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:48:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:39,604 INFO L87 Difference]: Start difference. First operand 11132 states and 14668 transitions. Second operand 37 states. [2020-12-22 09:48:40,790 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-12-22 09:48:41,052 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:48:41,317 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:48:41,647 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:48:41,953 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:48:42,309 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:48:42,756 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:48:43,258 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:48:43,790 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:48:44,365 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:48:44,893 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:45,442 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:46,037 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:48:46,849 WARN L197 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71