/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.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:07,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:07,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:07,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:07,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:07,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:07,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:07,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:07,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:07,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:07,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:07,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:07,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:07,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:07,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:07,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:07,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:07,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:07,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:07,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:07,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:07,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:07,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:07,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:07,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:41:07,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:07,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:07,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:07,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:07,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:07,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:07,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:07,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:07,755 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:07,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:07,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:07,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:07,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:07,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:07,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:07,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:07,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:07,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:07,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:07,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:07,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:07,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:07,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:07,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:07,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:07,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:07,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:07,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:07,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:07,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:08,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:08,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:08,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:08,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:08,210 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:08,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:41:08,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42396699/d9553a524b7d440f8c2a314295056f11/FLAG3ff6a62a7 [2020-12-22 09:41:09,344 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:09,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:41:09,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42396699/d9553a524b7d440f8c2a314295056f11/FLAG3ff6a62a7 [2020-12-22 09:41:09,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e42396699/d9553a524b7d440f8c2a314295056f11 [2020-12-22 09:41:09,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:09,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:09,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:09,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:09,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:09,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df54791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:09, skipping insertion in model container [2020-12-22 09:41:09,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:09" (1/1) ... [2020-12-22 09:41:09,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:09,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:10,429 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.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8725,8738] [2020-12-22 09:41:10,520 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.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14037,14050] [2020-12-22 09:41:11,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:11,614 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:11,717 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.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[8725,8738] [2020-12-22 09:41:11,733 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.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c[14037,14050] [2020-12-22 09:41:12,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:12,366 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:12,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12 WrapperNode [2020-12-22 09:41:12,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:12,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:12,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:12,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:12,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:12,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:12,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:12,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:12,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:12,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (1/1) ... [2020-12-22 09:41:13,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:13,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:13,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:13,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:13,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (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 09:41:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:13,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:13,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:18,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:18,830 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:18,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:18 BoogieIcfgContainer [2020-12-22 09:41:18,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:18,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:18,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:18,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:18,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:09" (1/3) ... [2020-12-22 09:41:18,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a7df61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:18, skipping insertion in model container [2020-12-22 09:41:18,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:12" (2/3) ... [2020-12-22 09:41:18,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a7df61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:18, skipping insertion in model container [2020-12-22 09:41:18,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:18" (3/3) ... [2020-12-22 09:41:18,843 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label01.c [2020-12-22 09:41:18,849 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:18,855 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:18,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:18,907 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:18,907 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:18,907 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:18,908 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:18,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:18,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:18,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:18,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:41:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:18,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:18,961 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 09:41:18,961 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:41:18,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632138657] [2020-12-22 09:41:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:19,322 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 09:41:19,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632138657] [2020-12-22 09:41:19,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:19,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132614345] [2020-12-22 09:41:19,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:19,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:19,351 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:41:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:19,452 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:41:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:19,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:41:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:19,485 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:41:19,485 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:41:19,496 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 09:41:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:41:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:41:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:41:19,633 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:41:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:19,634 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:41:19,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:41:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:19,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:19,636 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 09:41:19,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:19,637 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:41:19,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:19,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435955260] [2020-12-22 09:41:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:19,799 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 09:41:19,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435955260] [2020-12-22 09:41:19,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:19,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670363800] [2020-12-22 09:41:19,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:19,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:19,804 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:41:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:19,919 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:41:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:19,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:41:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:19,925 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:41:19,925 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:41:19,926 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 09:41:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:41:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:41:19,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:41:19,952 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:41:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:19,952 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:41:19,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:41:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:41:19,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:19,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:19,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:19,955 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1620709547, now seen corresponding path program 1 times [2020-12-22 09:41:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:19,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512502997] [2020-12-22 09:41:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:20,062 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 09:41:20,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512502997] [2020-12-22 09:41:20,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:20,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:20,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054871048] [2020-12-22 09:41:20,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:20,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:20,069 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:41:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,413 INFO L93 Difference]: Finished difference Result 2331 states and 4410 transitions. [2020-12-22 09:41:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:26,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:41:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:26,424 INFO L225 Difference]: With dead ends: 2331 [2020-12-22 09:41:26,425 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:41:26,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:41:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:41:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:41:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2912 transitions. [2020-12-22 09:41:26,472 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2912 transitions. Word has length 48 [2020-12-22 09:41:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:26,472 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2912 transitions. [2020-12-22 09:41:26,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2912 transitions. [2020-12-22 09:41:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:26,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:26,474 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 09:41:26,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:26,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:41:26,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:26,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969155433] [2020-12-22 09:41:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:26,564 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 09:41:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969155433] [2020-12-22 09:41:26,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:26,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:26,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611333543] [2020-12-22 09:41:26,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:26,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:26,569 INFO L87 Difference]: Start difference. First operand 1578 states and 2912 transitions. Second operand 3 states. [2020-12-22 09:41:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,617 INFO L93 Difference]: Finished difference Result 1660 states and 3040 transitions. [2020-12-22 09:41:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:26,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:26,627 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:41:26,628 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:41:26,629 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 09:41:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:41:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:41:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:41:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2969 transitions. [2020-12-22 09:41:26,670 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2969 transitions. Word has length 52 [2020-12-22 09:41:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:26,670 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2969 transitions. [2020-12-22 09:41:26,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2969 transitions. [2020-12-22 09:41:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:26,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:26,672 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 09:41:26,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:26,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:41:26,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:26,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666603467] [2020-12-22 09:41:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:26,733 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 09:41:26,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666603467] [2020-12-22 09:41:26,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:26,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269427898] [2020-12-22 09:41:26,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:26,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:26,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:26,736 INFO L87 Difference]: Start difference. First operand 1614 states and 2969 transitions. Second operand 3 states. [2020-12-22 09:41:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,778 INFO L93 Difference]: Finished difference Result 1762 states and 3201 transitions. [2020-12-22 09:41:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:26,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:26,791 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:41:26,791 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:41:26,792 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 09:41:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:41:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:41:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:41:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3072 transitions. [2020-12-22 09:41:26,838 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3072 transitions. Word has length 52 [2020-12-22 09:41:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:26,838 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 3072 transitions. [2020-12-22 09:41:26,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3072 transitions. [2020-12-22 09:41:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:26,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:26,840 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 09:41:26,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:26,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:41:26,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:26,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590855833] [2020-12-22 09:41:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:26,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590855833] [2020-12-22 09:41:26,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:26,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:26,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973160188] [2020-12-22 09:41:26,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:26,929 INFO L87 Difference]: Start difference. First operand 1680 states and 3072 transitions. Second operand 3 states. [2020-12-22 09:41:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,989 INFO L93 Difference]: Finished difference Result 1948 states and 3490 transitions. [2020-12-22 09:41:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:26,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,002 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:41:27,002 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:41:27,004 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 09:41:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:41:27,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:41:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:41:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3256 transitions. [2020-12-22 09:41:27,056 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3256 transitions. Word has length 52 [2020-12-22 09:41:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,057 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 3256 transitions. [2020-12-22 09:41:27,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3256 transitions. [2020-12-22 09:41:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,058 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 09:41:27,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:27,060 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:41:27,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21408580] [2020-12-22 09:41:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21408580] [2020-12-22 09:41:27,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964112119] [2020-12-22 09:41:27,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,154 INFO L87 Difference]: Start difference. First operand 1800 states and 3256 transitions. Second operand 3 states. [2020-12-22 09:41:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,210 INFO L93 Difference]: Finished difference Result 2284 states and 4002 transitions. [2020-12-22 09:41:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:27,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,223 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:41:27,224 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:41:27,225 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 09:41:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:41:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:41:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:41:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3580 transitions. [2020-12-22 09:41:27,286 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3580 transitions. Word has length 52 [2020-12-22 09:41:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,286 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3580 transitions. [2020-12-22 09:41:27,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3580 transitions. [2020-12-22 09:41:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,288 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 09:41:27,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:27,288 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:41:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23074125] [2020-12-22 09:41:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,357 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 09:41:27,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23074125] [2020-12-22 09:41:27,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:27,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213626061] [2020-12-22 09:41:27,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:27,360 INFO L87 Difference]: Start difference. First operand 2016 states and 3580 transitions. Second operand 6 states. [2020-12-22 09:41:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,679 INFO L93 Difference]: Finished difference Result 5872 states and 9476 transitions. [2020-12-22 09:41:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:41:27,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:41:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,710 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:41:27,710 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:41:27,714 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 09:41:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:41:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:41:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:41:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4284 transitions. [2020-12-22 09:41:27,849 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4284 transitions. Word has length 52 [2020-12-22 09:41:27,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,850 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 4284 transitions. [2020-12-22 09:41:27,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4284 transitions. [2020-12-22 09:41:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:41:27,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,851 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 09:41:27,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:27,852 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:41:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371595124] [2020-12-22 09:41:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,935 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 09:41:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371595124] [2020-12-22 09:41:27,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561168599] [2020-12-22 09:41:27,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,938 INFO L87 Difference]: Start difference. First operand 2496 states and 4284 transitions. Second operand 3 states. [2020-12-22 09:41:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,066 INFO L93 Difference]: Finished difference Result 3902 states and 6384 transitions. [2020-12-22 09:41:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:28,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:41:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,084 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:41:28,084 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:41:28,087 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 09:41:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:41:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:41:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:41:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4918 transitions. [2020-12-22 09:41:28,240 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4918 transitions. Word has length 54 [2020-12-22 09:41:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:28,241 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4918 transitions. [2020-12-22 09:41:28,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4918 transitions. [2020-12-22 09:41:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:41:28,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:28,242 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 09:41:28,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:28,242 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:41:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:28,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343805375] [2020-12-22 09:41:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:28,437 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 09:41:28,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343805375] [2020-12-22 09:41:28,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:28,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143288031] [2020-12-22 09:41:28,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:28,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:28,443 INFO L87 Difference]: Start difference. First operand 2938 states and 4918 transitions. Second operand 6 states. [2020-12-22 09:41:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,686 INFO L93 Difference]: Finished difference Result 4342 states and 6992 transitions. [2020-12-22 09:41:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:28,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:41:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,703 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:41:28,703 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:41:28,708 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 09:41:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:41:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:41:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:41:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4894 transitions. [2020-12-22 09:41:28,838 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4894 transitions. Word has length 54 [2020-12-22 09:41:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:28,838 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4894 transitions. [2020-12-22 09:41:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4894 transitions. [2020-12-22 09:41:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:28,839 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 09:41:28,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:28,840 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:41:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:28,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819697447] [2020-12-22 09:41:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:28,948 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 09:41:28,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819697447] [2020-12-22 09:41:28,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:28,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:28,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269625107] [2020-12-22 09:41:28,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:28,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:28,953 INFO L87 Difference]: Start difference. First operand 2938 states and 4894 transitions. Second operand 6 states. [2020-12-22 09:41:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,246 INFO L93 Difference]: Finished difference Result 4340 states and 6943 transitions. [2020-12-22 09:41:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:29,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,277 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:41:29,277 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:41:29,283 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 09:41:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:41:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:41:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:41:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4870 transitions. [2020-12-22 09:41:29,442 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4870 transitions. Word has length 55 [2020-12-22 09:41:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4870 transitions. [2020-12-22 09:41:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4870 transitions. [2020-12-22 09:41:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:29,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,443 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 09:41:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:29,444 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:41:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129191541] [2020-12-22 09:41:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:29,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129191541] [2020-12-22 09:41:29,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:29,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087402443] [2020-12-22 09:41:29,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:29,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:29,533 INFO L87 Difference]: Start difference. First operand 2938 states and 4870 transitions. Second operand 6 states. [2020-12-22 09:41:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,778 INFO L93 Difference]: Finished difference Result 4340 states and 6895 transitions. [2020-12-22 09:41:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:29,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,787 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:41:29,787 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:41:29,790 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 09:41:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:41:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:41:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:41:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4846 transitions. [2020-12-22 09:41:29,970 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4846 transitions. Word has length 55 [2020-12-22 09:41:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,970 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4846 transitions. [2020-12-22 09:41:29,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4846 transitions. [2020-12-22 09:41:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:29,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,974 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 09:41:29,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:29,976 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:41:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993284155] [2020-12-22 09:41:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,063 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 09:41:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993284155] [2020-12-22 09:41:30,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:30,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224083046] [2020-12-22 09:41:30,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:30,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:30,072 INFO L87 Difference]: Start difference. First operand 2938 states and 4846 transitions. Second operand 5 states. [2020-12-22 09:41:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:30,357 INFO L93 Difference]: Finished difference Result 4169 states and 6544 transitions. [2020-12-22 09:41:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:30,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:41:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:30,368 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:41:30,368 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:41:30,370 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 09:41:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:41:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:41:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:41:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4934 transitions. [2020-12-22 09:41:30,547 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4934 transitions. Word has length 55 [2020-12-22 09:41:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:30,548 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4934 transitions. [2020-12-22 09:41:30,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4934 transitions. [2020-12-22 09:41:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:30,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:30,554 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 09:41:30,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:30,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:41:30,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:30,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74378295] [2020-12-22 09:41:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,659 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 09:41:30,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74378295] [2020-12-22 09:41:30,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118015091] [2020-12-22 09:41:30,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:30,661 INFO L87 Difference]: Start difference. First operand 3034 states and 4934 transitions. Second operand 6 states. [2020-12-22 09:41:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:31,354 INFO L93 Difference]: Finished difference Result 9340 states and 13703 transitions. [2020-12-22 09:41:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:31,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:31,372 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:41:31,372 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:41:31,377 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 09:41:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:41:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:41:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:41:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6998 transitions. [2020-12-22 09:41:31,697 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6998 transitions. Word has length 79 [2020-12-22 09:41:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:31,697 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6998 transitions. [2020-12-22 09:41:31,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6998 transitions. [2020-12-22 09:41:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:31,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:31,700 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 09:41:31,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:31,701 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:41:31,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:31,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148104924] [2020-12-22 09:41:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:31,817 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 09:41:31,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148104924] [2020-12-22 09:41:31,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:31,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:31,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222085668] [2020-12-22 09:41:31,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:31,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:31,820 INFO L87 Difference]: Start difference. First operand 4530 states and 6998 transitions. Second operand 6 states. [2020-12-22 09:41:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:32,541 INFO L93 Difference]: Finished difference Result 10836 states and 15767 transitions. [2020-12-22 09:41:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:32,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:32,566 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:41:32,566 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:41:32,574 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 09:41:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:41:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:41:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:41:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10074 transitions. [2020-12-22 09:41:33,244 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10074 transitions. Word has length 79 [2020-12-22 09:41:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:33,244 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10074 transitions. [2020-12-22 09:41:33,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10074 transitions. [2020-12-22 09:41:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:33,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:33,248 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 09:41:33,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:33,248 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:41:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:33,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837074729] [2020-12-22 09:41:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:33,357 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 09:41:33,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837074729] [2020-12-22 09:41:33,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:33,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589781241] [2020-12-22 09:41:33,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:33,362 INFO L87 Difference]: Start difference. First operand 6778 states and 10074 transitions. Second operand 6 states. [2020-12-22 09:41:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:34,209 INFO L93 Difference]: Finished difference Result 12332 states and 17831 transitions. [2020-12-22 09:41:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:34,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:34,237 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:41:34,237 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:41:34,244 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 09:41:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:41:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:41:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:41:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12138 transitions. [2020-12-22 09:41:35,035 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12138 transitions. Word has length 79 [2020-12-22 09:41:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:35,036 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12138 transitions. [2020-12-22 09:41:35,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12138 transitions. [2020-12-22 09:41:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:35,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:35,039 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 09:41:35,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:41:35,040 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:41:35,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:35,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951312488] [2020-12-22 09:41:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:35,141 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 09:41:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951312488] [2020-12-22 09:41:35,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:35,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332927226] [2020-12-22 09:41:35,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:35,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:35,144 INFO L87 Difference]: Start difference. First operand 8274 states and 12138 transitions. Second operand 6 states. [2020-12-22 09:41:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:36,030 INFO L93 Difference]: Finished difference Result 12948 states and 18695 transitions. [2020-12-22 09:41:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:36,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:36,058 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:41:36,059 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:41:36,066 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 09:41:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:41:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:41:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:41:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13610 transitions. [2020-12-22 09:41:36,888 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13610 transitions. Word has length 79 [2020-12-22 09:41:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:36,888 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13610 transitions. [2020-12-22 09:41:36,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13610 transitions. [2020-12-22 09:41:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:41:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:36,892 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 09:41:36,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:41:36,893 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:41:36,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:36,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503968239] [2020-12-22 09:41:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,115 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 09:41:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503968239] [2020-12-22 09:41:37,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483381628] [2020-12-22 09:41:37,116 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 09:41:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:37,597 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:37,985 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 09:41:37,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:37,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:41:37,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870400615] [2020-12-22 09:41:37,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:37,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:37,991 INFO L87 Difference]: Start difference. First operand 9330 states and 13610 transitions. Second operand 18 states. [2020-12-22 09:41:39,872 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:41,856 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:41:43,312 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:41:44,736 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:46,863 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:47,440 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:47,612 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:41:48,458 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:41:48,874 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:41:49,575 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:41:50,827 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:41:51,428 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:41:51,563 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:51,871 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:55,782 INFO L93 Difference]: Finished difference Result 78396 states and 107583 transitions. [2020-12-22 09:41:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:41:55,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:41:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:55,946 INFO L225 Difference]: With dead ends: 78396 [2020-12-22 09:41:55,946 INFO L226 Difference]: Without dead ends: 70602 [2020-12-22 09:41:55,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:41:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70602 states. [2020-12-22 09:41:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70602 to 34810. [2020-12-22 09:41:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34810 states. [2020-12-22 09:41:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34810 states to 34810 states and 48552 transitions. [2020-12-22 09:41:59,448 INFO L78 Accepts]: Start accepts. Automaton has 34810 states and 48552 transitions. Word has length 80 [2020-12-22 09:41:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:59,449 INFO L481 AbstractCegarLoop]: Abstraction has 34810 states and 48552 transitions. [2020-12-22 09:41:59,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:41:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 34810 states and 48552 transitions. [2020-12-22 09:41:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:41:59,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:59,455 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 09:41:59,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:41:59,669 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:41:59,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:59,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78012430] [2020-12-22 09:41:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:59,761 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 09:41:59,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78012430] [2020-12-22 09:41:59,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:59,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:59,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004577207] [2020-12-22 09:41:59,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:59,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:59,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:59,766 INFO L87 Difference]: Start difference. First operand 34810 states and 48552 transitions. Second operand 3 states. [2020-12-22 09:42:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:02,726 INFO L93 Difference]: Finished difference Result 68086 states and 94260 transitions. [2020-12-22 09:42:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:02,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:02,795 INFO L225 Difference]: With dead ends: 68086 [2020-12-22 09:42:02,795 INFO L226 Difference]: Without dead ends: 34812 [2020-12-22 09:42:02,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34812 states. [2020-12-22 09:42:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34812 to 33850. [2020-12-22 09:42:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33850 states. [2020-12-22 09:42:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 46548 transitions. [2020-12-22 09:42:05,765 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 46548 transitions. Word has length 81 [2020-12-22 09:42:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:05,765 INFO L481 AbstractCegarLoop]: Abstraction has 33850 states and 46548 transitions. [2020-12-22 09:42:05,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 46548 transitions. [2020-12-22 09:42:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:05,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:05,769 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 09:42:05,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:05,769 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:05,770 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:42:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:05,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184140271] [2020-12-22 09:42:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:06,001 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 09:42:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184140271] [2020-12-22 09:42:06,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649957060] [2020-12-22 09:42:06,002 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 09:42:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:06,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:06,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:06,736 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 09:42:06,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:06,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:42:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705852111] [2020-12-22 09:42:06,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:42:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:42:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:42:06,739 INFO L87 Difference]: Start difference. First operand 33850 states and 46548 transitions. Second operand 18 states. [2020-12-22 09:42:06,935 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:07,078 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:42:07,224 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:42:07,368 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:42:07,520 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:08,047 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:42:08,273 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:09,281 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:09,757 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:10,113 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:13,231 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:13,643 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:13,800 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:14,120 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:14,277 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:14,425 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:14,732 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:15,335 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:15,564 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:15,907 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:16,271 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:16,472 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-12-22 09:42:16,837 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:17,222 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:17,405 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:17,816 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:19,716 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:20,030 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:24,361 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:24,763 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:24,930 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:42:25,524 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:25,838 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:26,410 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:42:26,782 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:26,976 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:35,338 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:35,949 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:40,173 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:40,669 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:45,813 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:51,406 INFO L93 Difference]: Finished difference Result 360077 states and 479378 transitions. [2020-12-22 09:42:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:42:51,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-22 09:42:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:52,303 INFO L225 Difference]: With dead ends: 360077 [2020-12-22 09:42:52,303 INFO L226 Difference]: Without dead ends: 327763 [2020-12-22 09:42:52,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2700, Invalid=15390, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 09:42:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327763 states. [2020-12-22 09:43:09,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327763 to 160661. [2020-12-22 09:43:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160661 states. [2020-12-22 09:43:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160661 states to 160661 states and 216414 transitions. [2020-12-22 09:43:09,893 INFO L78 Accepts]: Start accepts. Automaton has 160661 states and 216414 transitions. Word has length 81 [2020-12-22 09:43:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:09,893 INFO L481 AbstractCegarLoop]: Abstraction has 160661 states and 216414 transitions. [2020-12-22 09:43:09,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:43:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 160661 states and 216414 transitions. [2020-12-22 09:43:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:09,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:09,899 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 09:43:10,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:10,115 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:43:10,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:10,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875649603] [2020-12-22 09:43:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:10,463 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 09:43:10,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875649603] [2020-12-22 09:43:10,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:10,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:10,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095214279] [2020-12-22 09:43:10,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:10,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:10,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:10,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:10,466 INFO L87 Difference]: Start difference. First operand 160661 states and 216414 transitions. Second operand 3 states. [2020-12-22 09:43:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:19,019 INFO L93 Difference]: Finished difference Result 249025 states and 334630 transitions. [2020-12-22 09:43:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:19,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:19,234 INFO L225 Difference]: With dead ends: 249025 [2020-12-22 09:43:19,235 INFO L226 Difference]: Without dead ends: 89900 [2020-12-22 09:43:19,649 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 09:43:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89900 states. [2020-12-22 09:43:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89900 to 89898. [2020-12-22 09:43:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89898 states. [2020-12-22 09:43:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89898 states to 89898 states and 119436 transitions. [2020-12-22 09:43:27,977 INFO L78 Accepts]: Start accepts. Automaton has 89898 states and 119436 transitions. Word has length 81 [2020-12-22 09:43:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:27,977 INFO L481 AbstractCegarLoop]: Abstraction has 89898 states and 119436 transitions. [2020-12-22 09:43:27,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 89898 states and 119436 transitions. [2020-12-22 09:43:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:27,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:27,983 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 09:43:27,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:43:27,983 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:43:27,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:27,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473784508] [2020-12-22 09:43:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:28,038 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 09:43:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473784508] [2020-12-22 09:43:28,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:28,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:28,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030388653] [2020-12-22 09:43:28,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:28,041 INFO L87 Difference]: Start difference. First operand 89898 states and 119436 transitions. Second operand 3 states. [2020-12-22 09:43:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:30,945 INFO L93 Difference]: Finished difference Result 114995 states and 153084 transitions. [2020-12-22 09:43:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:30,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:30,984 INFO L225 Difference]: With dead ends: 114995 [2020-12-22 09:43:30,984 INFO L226 Difference]: Without dead ends: 26633 [2020-12-22 09:43:31,017 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 09:43:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26633 states. [2020-12-22 09:43:33,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26633 to 26631. [2020-12-22 09:43:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26631 states. [2020-12-22 09:43:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26631 states to 26631 states and 36032 transitions. [2020-12-22 09:43:33,519 INFO L78 Accepts]: Start accepts. Automaton has 26631 states and 36032 transitions. Word has length 81 [2020-12-22 09:43:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:33,519 INFO L481 AbstractCegarLoop]: Abstraction has 26631 states and 36032 transitions. [2020-12-22 09:43:33,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26631 states and 36032 transitions. [2020-12-22 09:43:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:33,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:33,523 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 09:43:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:43:33,523 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:33,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:43:33,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:33,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919073350] [2020-12-22 09:43:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:33,628 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 09:43:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919073350] [2020-12-22 09:43:33,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:33,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661134805] [2020-12-22 09:43:33,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:33,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:33,630 INFO L87 Difference]: Start difference. First operand 26631 states and 36032 transitions. Second operand 6 states. [2020-12-22 09:43:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:35,973 INFO L93 Difference]: Finished difference Result 40673 states and 54578 transitions. [2020-12-22 09:43:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:35,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:43:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:35,992 INFO L225 Difference]: With dead ends: 40673 [2020-12-22 09:43:35,993 INFO L226 Difference]: Without dead ends: 15637 [2020-12-22 09:43:36,004 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 09:43:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15637 states. [2020-12-22 09:43:37,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15637 to 15637. [2020-12-22 09:43:37,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15637 states. [2020-12-22 09:43:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15637 states to 15637 states and 21227 transitions. [2020-12-22 09:43:37,507 INFO L78 Accepts]: Start accepts. Automaton has 15637 states and 21227 transitions. Word has length 81 [2020-12-22 09:43:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:37,507 INFO L481 AbstractCegarLoop]: Abstraction has 15637 states and 21227 transitions. [2020-12-22 09:43:37,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 15637 states and 21227 transitions. [2020-12-22 09:43:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:37,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:37,510 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 09:43:37,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:43:37,510 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:43:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:37,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894562387] [2020-12-22 09:43:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:37,667 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 09:43:37,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894562387] [2020-12-22 09:43:37,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:37,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:37,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130015938] [2020-12-22 09:43:37,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:37,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:37,670 INFO L87 Difference]: Start difference. First operand 15637 states and 21227 transitions. Second operand 6 states. [2020-12-22 09:43:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:40,391 INFO L93 Difference]: Finished difference Result 40009 states and 53283 transitions. [2020-12-22 09:43:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:40,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:43:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:40,424 INFO L225 Difference]: With dead ends: 40009 [2020-12-22 09:43:40,424 INFO L226 Difference]: Without dead ends: 25940 [2020-12-22 09:43:40,435 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 09:43:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25940 states. [2020-12-22 09:43:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25940 to 23122. [2020-12-22 09:43:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23122 states. [2020-12-22 09:43:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23122 states to 23122 states and 30904 transitions. [2020-12-22 09:43:42,631 INFO L78 Accepts]: Start accepts. Automaton has 23122 states and 30904 transitions. Word has length 81 [2020-12-22 09:43:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:42,631 INFO L481 AbstractCegarLoop]: Abstraction has 23122 states and 30904 transitions. [2020-12-22 09:43:42,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 23122 states and 30904 transitions. [2020-12-22 09:43:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:42,633 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 09:43:42,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:43:42,634 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:43:42,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:42,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705127758] [2020-12-22 09:43:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:42,700 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 09:43:42,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705127758] [2020-12-22 09:43:42,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:42,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127307314] [2020-12-22 09:43:42,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:42,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:42,703 INFO L87 Difference]: Start difference. First operand 23122 states and 30904 transitions. Second operand 3 states. [2020-12-22 09:43:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:43,856 INFO L93 Difference]: Finished difference Result 33926 states and 44848 transitions. [2020-12-22 09:43:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:43,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:43:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:43,873 INFO L225 Difference]: With dead ends: 33926 [2020-12-22 09:43:43,873 INFO L226 Difference]: Without dead ends: 12376 [2020-12-22 09:43:43,887 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 09:43:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12376 states. [2020-12-22 09:43:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12376 to 12374. [2020-12-22 09:43:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12374 states. [2020-12-22 09:43:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12374 states to 12374 states and 16626 transitions. [2020-12-22 09:43:44,999 INFO L78 Accepts]: Start accepts. Automaton has 12374 states and 16626 transitions. Word has length 82 [2020-12-22 09:43:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:44,999 INFO L481 AbstractCegarLoop]: Abstraction has 12374 states and 16626 transitions. [2020-12-22 09:43:44,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 12374 states and 16626 transitions. [2020-12-22 09:43:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:43:45,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:45,001 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 09:43:45,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:43:45,001 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:45,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:45,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:43:45,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:45,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807156085] [2020-12-22 09:43:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:45,778 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 09:43:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807156085] [2020-12-22 09:43:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962350338] [2020-12-22 09:43:45,778 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 09:43:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 09:43:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:47,100 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 09:43:58,975 WARN L197 SmtUtils]: Spent 10.76 s on a formula simplification. DAG size of input: 413 DAG size of output: 104 [2020-12-22 09:43:59,840 WARN L197 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-22 09:44:00,930 WARN L197 SmtUtils]: Spent 907.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:02,280 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:04,933 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-12-22 09:44:05,024 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:09,409 WARN L197 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 294 DAG size of output: 113 [2020-12-22 09:44:09,694 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:15,618 WARN L197 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 274 DAG size of output: 113 [2020-12-22 09:44:15,655 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:15,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:15,757 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 3 disjuncts [2020-12-22 09:44:15,762 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 09:44:15,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:44:15,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 09:44:15,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499957802] [2020-12-22 09:44:15,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:44:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:44:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:44:15,765 INFO L87 Difference]: Start difference. First operand 12374 states and 16626 transitions. Second operand 13 states. [2020-12-22 09:44:16,464 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-12-22 09:44:16,875 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-12-22 09:44:17,102 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:17,338 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:17,801 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:44:18,075 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 09:44:18,649 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:44:18,917 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:44:19,214 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:44:19,483 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:44:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:21,011 INFO L93 Difference]: Finished difference Result 21498 states and 28053 transitions. [2020-12-22 09:44:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:44:21,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-12-22 09:44:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:21,042 INFO L225 Difference]: With dead ends: 21498 [2020-12-22 09:44:21,042 INFO L226 Difference]: Without dead ends: 17338 [2020-12-22 09:44:21,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 09:44:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17338 states. [2020-12-22 09:44:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17338 to 11848. [2020-12-22 09:44:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11848 states. [2020-12-22 09:44:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 15906 transitions. [2020-12-22 09:44:22,264 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 15906 transitions. Word has length 83 [2020-12-22 09:44:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:22,264 INFO L481 AbstractCegarLoop]: Abstraction has 11848 states and 15906 transitions. [2020-12-22 09:44:22,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:44:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 15906 transitions. [2020-12-22 09:44:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:22,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:22,266 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 09:44:22,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:44:22,467 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:44:22,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:22,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769311165] [2020-12-22 09:44:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:23,049 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:23,488 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 09:44:23,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769311165] [2020-12-22 09:44:23,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695881234] [2020-12-22 09:44:23,489 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 09:44:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:23,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:44:23,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:24,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:24,743 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:44:25,725 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:44:25,799 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 09:44:25,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:25,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673480439] [2020-12-22 09:44:25,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:25,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:25,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:25,802 INFO L87 Difference]: Start difference. First operand 11848 states and 15906 transitions. Second operand 24 states. [2020-12-22 09:44:26,695 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-12-22 09:44:27,068 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-12-22 09:44:27,550 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:28,097 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:28,498 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:44:29,246 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 09:44:29,526 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 09:44:30,019 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:44:30,407 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 09:44:31,457 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-22 09:44:32,035 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:44:33,032 WARN L197 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-12-22 09:44:33,888 WARN L197 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-22 09:44:34,339 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:44:34,862 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:44:35,649 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:44:36,080 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:44:36,592 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:44:38,777 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:39,678 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-12-22 09:44:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:41,590 INFO L93 Difference]: Finished difference Result 36763 states and 46578 transitions. [2020-12-22 09:44:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 09:44:41,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2020-12-22 09:44:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:41,638 INFO L225 Difference]: With dead ends: 36763 [2020-12-22 09:44:41,638 INFO L226 Difference]: Without dead ends: 32584 [2020-12-22 09:44:41,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 09:44:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32584 states. [2020-12-22 09:44:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32584 to 18028. [2020-12-22 09:44:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18028 states. [2020-12-22 09:44:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18028 states to 18028 states and 23558 transitions. [2020-12-22 09:44:43,965 INFO L78 Accepts]: Start accepts. Automaton has 18028 states and 23558 transitions. Word has length 83 [2020-12-22 09:44:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:43,965 INFO L481 AbstractCegarLoop]: Abstraction has 18028 states and 23558 transitions. [2020-12-22 09:44:43,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:44:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 18028 states and 23558 transitions. [2020-12-22 09:44:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:43,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:43,967 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 09:44:44,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:44,168 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1008179547, now seen corresponding path program 1 times [2020-12-22 09:44:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:44,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136557341] [2020-12-22 09:44:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:44,767 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:44:45,102 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:45,248 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2020-12-22 09:44:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:45,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136557341] [2020-12-22 09:44:45,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327055236] [2020-12-22 09:44:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:44:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:46,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:46,662 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-12-22 09:44:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:47,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:47,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:47,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035631090] [2020-12-22 09:44:47,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:47,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:47,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:47,345 INFO L87 Difference]: Start difference. First operand 18028 states and 23558 transitions. Second operand 24 states. [2020-12-22 09:44:47,545 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-12-22 09:44:47,985 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2020-12-22 09:44:48,232 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2020-12-22 09:44:48,675 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-12-22 09:44:49,126 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-12-22 09:44:49,642 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-12-22 09:44:50,041 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 09:44:50,414 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-12-22 09:44:50,785 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-12-22 09:44:51,074 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 09:44:51,425 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-12-22 09:44:52,226 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-12-22 09:44:52,986 WARN L197 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-12-22 09:44:53,353 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-12-22 09:44:53,783 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2020-12-22 09:44:54,262 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25