/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:41:12,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:41:12,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:41:12,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:41:12,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:41:12,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:41:12,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:41:12,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:41:12,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:41:12,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:41:12,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:41:12,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:41:12,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:41:12,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:41:12,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:41:12,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:41:12,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:41:12,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:41:12,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:41:12,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:41:12,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:41:12,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:41:12,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:41:12,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:41:12,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:41:12,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:41:12,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:41:12,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:41:12,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:41:12,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:41:12,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:41:12,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:41:12,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:41:12,634 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:41:12,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:41:12,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:41:12,635 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:41:12,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:41:12,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:41:12,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:41:12,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:41:12,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:41:12,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:41:12,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:41:12,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:41:12,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:41:12,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:41:12,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:41:12,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:41:12,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:41:13,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:41:13,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:41:13,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:41:13,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:41:13,170 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:41:13,172 INFO L432 ainManager$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_label02.c [2020-12-22 09:41:13,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06bd0b5/21b743ced39041ed8690ecff3410dcf5/FLAGdaa539085 [2020-12-22 09:41:14,562 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:41:14,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c [2020-12-22 09:41:14,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06bd0b5/21b743ced39041ed8690ecff3410dcf5/FLAGdaa539085 [2020-12-22 09:41:14,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a06bd0b5/21b743ced39041ed8690ecff3410dcf5 [2020-12-22 09:41:14,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:41:14,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:41:14,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:14,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:41:14,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:41:14,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:14" (1/1) ... [2020-12-22 09:41:14,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af0bd9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:14, skipping insertion in model container [2020-12-22 09:41:14,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:41:14" (1/1) ... [2020-12-22 09:41:14,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:41:15,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:41:15,603 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_label02.c[8725,8738] [2020-12-22 09:41:15,690 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_label02.c[15772,15785] [2020-12-22 09:41:16,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:16,938 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:41:16,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c[8725,8738] [2020-12-22 09:41:17,010 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_label02.c[15772,15785] [2020-12-22 09:41:17,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:41:17,789 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:41:17,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17 WrapperNode [2020-12-22 09:41:17,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:41:17,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:17,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:41:17,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:41:17,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:17,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:18,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:41:18,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:41:18,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:41:18,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:41:18,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:18,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:18,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:18,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:18,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:19,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:19,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (1/1) ... [2020-12-22 09:41:19,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:41:19,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:41:19,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:41:19,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:41:19,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (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 09:41:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:41:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:41:19,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:41:19,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:41:25,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:41:25,702 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:41:25,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:25 BoogieIcfgContainer [2020-12-22 09:41:25,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:41:25,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:41:25,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:41:25,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:41:25,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:41:14" (1/3) ... [2020-12-22 09:41:25,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d16f862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:25, skipping insertion in model container [2020-12-22 09:41:25,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:41:17" (2/3) ... [2020-12-22 09:41:25,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d16f862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:41:25, skipping insertion in model container [2020-12-22 09:41:25,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:41:25" (3/3) ... [2020-12-22 09:41:25,722 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c [2020-12-22 09:41:25,729 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:41:25,735 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:41:25,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:41:25,848 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:41:25,848 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:41:25,848 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:41:25,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:41:25,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:41:25,849 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:41:25,849 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:41:25,849 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:41:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:41:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:25,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:25,905 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 09:41:25,906 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:41:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:25,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35775565] [2020-12-22 09:41:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:26,166 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 09:41:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35775565] [2020-12-22 09:41:26,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:26,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:41:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343155058] [2020-12-22 09:41:26,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:41:26,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:41:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:41:26,201 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:41:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,306 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:41:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:41:26,308 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:41:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:26,342 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:41:26,342 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:41:26,359 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 09:41:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:41:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:41:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:41:26,500 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:41:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:26,501 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:41:26,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:41:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:41:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:41:26,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:26,504 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 09:41:26,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:41:26,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:41:26,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516534594] [2020-12-22 09:41:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:41:26,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516534594] [2020-12-22 09:41:26,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:26,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226050176] [2020-12-22 09:41:26,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:26,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:26,741 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:41:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:26,918 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:41:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:26,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:41:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:26,928 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:41:26,928 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:41:26,930 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 09:41:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:41:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:41:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:41:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:41:26,952 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:41:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:26,952 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:41:26,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:41:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:26,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:26,963 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 09:41:26,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:41:26,964 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:41:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:26,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179137867] [2020-12-22 09:41:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,122 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 09:41:27,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179137867] [2020-12-22 09:41:27,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339967058] [2020-12-22 09:41:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,129 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:41:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,168 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:41:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:27,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,175 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:41:27,175 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:41:27,176 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 09:41:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:41:27,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:41:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:41:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:41:27,202 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:41:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,202 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:41:27,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:41:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,204 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 09:41:27,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:41:27,205 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:41:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584197081] [2020-12-22 09:41:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,337 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 09:41:27,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584197081] [2020-12-22 09:41:27,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37037907] [2020-12-22 09:41:27,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,340 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:41:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,380 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:41:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:27,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,387 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:41:27,387 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:41:27,388 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 09:41:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:41:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:41:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:41:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:41:27,416 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:41:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,417 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:41:27,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:41:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,418 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 09:41:27,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:41:27,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:41:27,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658165667] [2020-12-22 09:41:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,534 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 09:41:27,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658165667] [2020-12-22 09:41:27,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042482222] [2020-12-22 09:41:27,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,538 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:41:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,600 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:41:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:27,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,610 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:41:27,610 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:41:27,611 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 09:41:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:41:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:41:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:41:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:41:27,652 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:41:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,653 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:41:27,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:41:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,656 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 09:41:27,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:41:27,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:41:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161699445] [2020-12-22 09:41:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:27,781 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 09:41:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161699445] [2020-12-22 09:41:27,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:27,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:27,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878007201] [2020-12-22 09:41:27,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:27,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:27,786 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:41:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:27,835 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:41:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:27,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:41:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:27,846 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:41:27,846 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:41:27,847 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 09:41:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:41:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:41:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:41:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:41:27,920 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:41:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:27,920 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:41:27,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:41:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:41:27,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:27,922 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 09:41:27,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:41:27,922 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:41:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:27,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284747418] [2020-12-22 09:41:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:28,011 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 09:41:28,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284747418] [2020-12-22 09:41:28,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:28,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:28,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064894663] [2020-12-22 09:41:28,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:28,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:28,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:28,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:28,014 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:41:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,346 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:41:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:41:28,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:41:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,374 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:41:28,375 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:41:28,379 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 09:41:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:41:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:41:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:41:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:41:28,551 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:41:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:28,551 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:41:28,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:41:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:41:28,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:28,553 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 09:41:28,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:41:28,553 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:41:28,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:28,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213394024] [2020-12-22 09:41:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:28,611 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 09:41:28,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213394024] [2020-12-22 09:41:28,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:28,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700211084] [2020-12-22 09:41:28,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:41:28,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:41:28,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:41:28,615 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:41:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:28,713 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:41:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:41:28,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:41:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:28,729 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:41:28,729 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:41:28,735 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 09:41:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:41:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:41:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:41:28,837 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 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 2187 states and 3543 transitions. [2020-12-22 09:41:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:41:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:41:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [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] [2020-12-22 09:41:28,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:41:28,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [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 1303474603, now seen corresponding path program 1 times [2020-12-22 09:41:28,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:28,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622457421] [2020-12-22 09:41:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,042 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 09:41:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622457421] [2020-12-22 09:41:29,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:29,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:29,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340282349] [2020-12-22 09:41:29,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:29,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:29,045 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:41:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,281 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:41:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:29,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:41:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,294 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:41:29,294 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:41:29,297 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 09:41:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:41:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:41:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:41:29,396 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:41:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,397 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:41:29,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:41:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:29,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,398 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 09:41:29,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:41:29,398 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:41:29,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953702412] [2020-12-22 09:41:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:29,509 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 09:41:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953702412] [2020-12-22 09:41:29,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:29,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:29,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911698843] [2020-12-22 09:41:29,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:29,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:29,511 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:41:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:29,720 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:41:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:29,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:29,733 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:41:29,734 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:41:29,737 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 09:41:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:41:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:41:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:41:29,915 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:41:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:29,916 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:41:29,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:41:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:29,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:29,917 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 09:41:29,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:41:29,917 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:29,918 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:41:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094118044] [2020-12-22 09:41:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,020 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 09:41:30,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094118044] [2020-12-22 09:41:30,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98011869] [2020-12-22 09:41:30,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:30,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:30,025 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:41:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:30,284 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:41:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:30,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:41:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:30,297 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:41:30,298 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:41:30,301 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 09:41:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:41:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:41:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:41:30,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:41:30,440 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:41:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:30,440 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:41:30,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:41:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:41:30,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:30,441 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 09:41:30,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:41:30,442 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:41:30,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:30,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55093639] [2020-12-22 09:41:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:30,540 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 09:41:30,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55093639] [2020-12-22 09:41:30,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:30,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:41:30,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523445991] [2020-12-22 09:41:30,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:41:30,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:30,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:41:30,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:30,543 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:41:30,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:30,823 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:41:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:41:30,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:41:30,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:30,842 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:41:30,842 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:41:30,844 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 09:41:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:41:30,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:41:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:41:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:41:31,001 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:41:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:31,001 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:41:31,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:41:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:41:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:41:31,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:31,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:41:31,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:41:31,010 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash -748597284, now seen corresponding path program 1 times [2020-12-22 09:41:31,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:31,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923452904] [2020-12-22 09:41:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:31,112 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 09:41:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923452904] [2020-12-22 09:41:31,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:31,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:41:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903728063] [2020-12-22 09:41:31,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:41:31,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:41:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:41:31,121 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:41:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:42,901 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:41:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:41:42,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 09:41:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:42,922 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:41:42,922 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:41:42,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:41:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:41:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:41:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:41:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5685 transitions. [2020-12-22 09:41:43,105 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5685 transitions. Word has length 63 [2020-12-22 09:41:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:43,106 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5685 transitions. [2020-12-22 09:41:43,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:41:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5685 transitions. [2020-12-22 09:41:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:43,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:43,109 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 09:41:43,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:41:43,109 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:41:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:43,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794484215] [2020-12-22 09:41:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:43,204 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 09:41:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794484215] [2020-12-22 09:41:43,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:43,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318570521] [2020-12-22 09:41:43,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:43,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:43,207 INFO L87 Difference]: Start difference. First operand 3785 states and 5685 transitions. Second operand 6 states. [2020-12-22 09:41:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:43,877 INFO L93 Difference]: Finished difference Result 10091 states and 14454 transitions. [2020-12-22 09:41:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:43,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:43,916 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:41:43,917 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:41:43,923 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 09:41:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:41:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:41:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:41:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7749 transitions. [2020-12-22 09:41:44,302 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7749 transitions. Word has length 79 [2020-12-22 09:41:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:44,302 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7749 transitions. [2020-12-22 09:41:44,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7749 transitions. [2020-12-22 09:41:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:44,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:44,305 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 09:41:44,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:41:44,306 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:44,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:41:44,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:44,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922856667] [2020-12-22 09:41:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:44,420 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 09:41:44,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922856667] [2020-12-22 09:41:44,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:44,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:44,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654451830] [2020-12-22 09:41:44,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:44,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:44,423 INFO L87 Difference]: Start difference. First operand 5281 states and 7749 transitions. Second operand 6 states. [2020-12-22 09:41:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:45,122 INFO L93 Difference]: Finished difference Result 11587 states and 16518 transitions. [2020-12-22 09:41:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:45,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:45,156 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:41:45,157 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:41:45,165 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 09:41:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:41:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:41:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:41:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10825 transitions. [2020-12-22 09:41:45,815 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10825 transitions. Word has length 79 [2020-12-22 09:41:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:45,816 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10825 transitions. [2020-12-22 09:41:45,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10825 transitions. [2020-12-22 09:41:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:45,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:45,819 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 09:41:45,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:41:45,820 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:41:45,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:45,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092492433] [2020-12-22 09:41:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:45,932 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 09:41:45,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092492433] [2020-12-22 09:41:45,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:45,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202356602] [2020-12-22 09:41:45,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:45,937 INFO L87 Difference]: Start difference. First operand 7529 states and 10825 transitions. Second operand 6 states. [2020-12-22 09:41:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:46,707 INFO L93 Difference]: Finished difference Result 13083 states and 18582 transitions. [2020-12-22 09:41:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:46,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:46,733 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:41:46,734 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:41:46,738 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 09:41:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:41:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:41:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:41:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12889 transitions. [2020-12-22 09:41:47,271 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12889 transitions. Word has length 79 [2020-12-22 09:41:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:47,271 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12889 transitions. [2020-12-22 09:41:47,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12889 transitions. [2020-12-22 09:41:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:41:47,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:47,275 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 09:41:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:41:47,275 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:47,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:41:47,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:47,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715070384] [2020-12-22 09:41:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:47,363 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 09:41:47,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715070384] [2020-12-22 09:41:47,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:41:47,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:41:47,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991867968] [2020-12-22 09:41:47,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:41:47,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:41:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:41:47,365 INFO L87 Difference]: Start difference. First operand 9025 states and 12889 transitions. Second operand 6 states. [2020-12-22 09:41:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:41:48,082 INFO L93 Difference]: Finished difference Result 13699 states and 19446 transitions. [2020-12-22 09:41:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:41:48,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:41:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:41:48,107 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:41:48,108 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:41:48,113 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 09:41:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:41:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:41:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:41:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14361 transitions. [2020-12-22 09:41:48,807 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14361 transitions. Word has length 79 [2020-12-22 09:41:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:41:48,807 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14361 transitions. [2020-12-22 09:41:48,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:41:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14361 transitions. [2020-12-22 09:41:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:41:48,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:41:48,811 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 09:41:48,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:41:48,812 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:41:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:41:48,812 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:41:48,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:41:48,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552987651] [2020-12-22 09:41:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:41:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:49,042 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 09:41:49,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552987651] [2020-12-22 09:41:49,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171118541] [2020-12-22 09:41:49,043 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 09:41:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:41:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:41:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:41:49,693 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:41:50,046 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 09:41:50,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:41:50,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:41:50,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621016611] [2020-12-22 09:41:50,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:41:50,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:41:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:41:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:41:50,049 INFO L87 Difference]: Start difference. First operand 10081 states and 14361 transitions. Second operand 18 states. [2020-12-22 09:41:50,177 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:41:52,428 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:53,535 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:41:54,182 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:41:54,621 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:41:55,848 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:41:57,161 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:41:57,306 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:41:59,766 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:00,382 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:00,559 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:42:00,700 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:01,051 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:42:01,430 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:42:01,841 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:42:02,591 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:42:04,031 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:04,682 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:42:04,812 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:05,116 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:42:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:09,149 INFO L93 Difference]: Finished difference Result 79147 states and 108334 transitions. [2020-12-22 09:42:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:42:09,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:42:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:09,282 INFO L225 Difference]: With dead ends: 79147 [2020-12-22 09:42:09,282 INFO L226 Difference]: Without dead ends: 71353 [2020-12-22 09:42:09,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:42:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71353 states. [2020-12-22 09:42:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71353 to 35561. [2020-12-22 09:42:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35561 states. [2020-12-22 09:42:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35561 states to 35561 states and 49303 transitions. [2020-12-22 09:42:12,674 INFO L78 Accepts]: Start accepts. Automaton has 35561 states and 49303 transitions. Word has length 80 [2020-12-22 09:42:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:12,674 INFO L481 AbstractCegarLoop]: Abstraction has 35561 states and 49303 transitions. [2020-12-22 09:42:12,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:42:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 35561 states and 49303 transitions. [2020-12-22 09:42:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:12,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:12,679 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 09:42:12,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:42:12,883 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:42:12,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:12,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326201636] [2020-12-22 09:42:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:12,945 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 09:42:12,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326201636] [2020-12-22 09:42:12,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:42:12,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:42:12,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829636678] [2020-12-22 09:42:12,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:42:12,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:42:12,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:42:12,950 INFO L87 Difference]: Start difference. First operand 35561 states and 49303 transitions. Second operand 3 states. [2020-12-22 09:42:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:42:15,863 INFO L93 Difference]: Finished difference Result 68837 states and 95011 transitions. [2020-12-22 09:42:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:42:15,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:42:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:42:15,918 INFO L225 Difference]: With dead ends: 68837 [2020-12-22 09:42:15,918 INFO L226 Difference]: Without dead ends: 35563 [2020-12-22 09:42:16,114 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 09:42:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35563 states. [2020-12-22 09:42:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35563 to 34601. [2020-12-22 09:42:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34601 states. [2020-12-22 09:42:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34601 states to 34601 states and 47299 transitions. [2020-12-22 09:42:19,060 INFO L78 Accepts]: Start accepts. Automaton has 34601 states and 47299 transitions. Word has length 81 [2020-12-22 09:42:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:42:19,061 INFO L481 AbstractCegarLoop]: Abstraction has 34601 states and 47299 transitions. [2020-12-22 09:42:19,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:42:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34601 states and 47299 transitions. [2020-12-22 09:42:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:42:19,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:42:19,065 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 09:42:19,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:42:19,065 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:42:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:42:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:42:19,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:42:19,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083182891] [2020-12-22 09:42:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:42:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:19,330 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 09:42:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083182891] [2020-12-22 09:42:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000854179] [2020-12-22 09:42:19,331 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 09:42:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:42:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:42:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:42:19,668 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:42:20,052 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 09:42:20,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:42:20,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:42:20,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884030448] [2020-12-22 09:42:20,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:42:20,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:42:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:42:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:42:20,055 INFO L87 Difference]: Start difference. First operand 34601 states and 47299 transitions. Second operand 18 states. [2020-12-22 09:42:20,237 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:20,501 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:42:20,654 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:42:20,825 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:21,363 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-12-22 09:42:22,592 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:23,404 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:42:26,938 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:27,447 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:28,029 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:28,267 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:28,615 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:28,783 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-22 09:42:29,063 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:42:29,589 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:30,145 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:30,539 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:42:32,447 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:32,776 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:42:37,666 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:38,381 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 09:42:38,651 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:42:48,415 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:49,027 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:42:53,106 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:42:53,604 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:43:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:05,008 INFO L93 Difference]: Finished difference Result 360828 states and 480129 transitions. [2020-12-22 09:43:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:43:05,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-22 09:43:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:05,899 INFO L225 Difference]: With dead ends: 360828 [2020-12-22 09:43:05,900 INFO L226 Difference]: Without dead ends: 328514 [2020-12-22 09:43:06,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6667 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2700, Invalid=15390, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 09:43:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328514 states. [2020-12-22 09:43:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328514 to 161412. [2020-12-22 09:43:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161412 states. [2020-12-22 09:43:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161412 states to 161412 states and 217165 transitions. [2020-12-22 09:43:23,937 INFO L78 Accepts]: Start accepts. Automaton has 161412 states and 217165 transitions. Word has length 81 [2020-12-22 09:43:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:23,938 INFO L481 AbstractCegarLoop]: Abstraction has 161412 states and 217165 transitions. [2020-12-22 09:43:23,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:43:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 161412 states and 217165 transitions. [2020-12-22 09:43:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:23,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:23,944 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 09:43:24,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:24,160 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:43:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143363306] [2020-12-22 09:43:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:24,541 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 09:43:24,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143363306] [2020-12-22 09:43:24,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:24,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:24,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888259803] [2020-12-22 09:43:24,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:24,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:24,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:24,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,547 INFO L87 Difference]: Start difference. First operand 161412 states and 217165 transitions. Second operand 3 states. [2020-12-22 09:43:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:33,510 INFO L93 Difference]: Finished difference Result 249776 states and 335381 transitions. [2020-12-22 09:43:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:33,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:33,676 INFO L225 Difference]: With dead ends: 249776 [2020-12-22 09:43:33,677 INFO L226 Difference]: Without dead ends: 90651 [2020-12-22 09:43:33,769 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 09:43:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90651 states. [2020-12-22 09:43:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90651 to 90649. [2020-12-22 09:43:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90649 states. [2020-12-22 09:43:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90649 states to 90649 states and 120187 transitions. [2020-12-22 09:43:42,379 INFO L78 Accepts]: Start accepts. Automaton has 90649 states and 120187 transitions. Word has length 81 [2020-12-22 09:43:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:42,380 INFO L481 AbstractCegarLoop]: Abstraction has 90649 states and 120187 transitions. [2020-12-22 09:43:42,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 90649 states and 120187 transitions. [2020-12-22 09:43:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:42,384 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 09:43:42,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:43:42,384 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:43:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:42,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223643026] [2020-12-22 09:43:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:42,482 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 09:43:42,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223643026] [2020-12-22 09:43:42,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:42,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224587328] [2020-12-22 09:43:42,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:42,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:42,486 INFO L87 Difference]: Start difference. First operand 90649 states and 120187 transitions. Second operand 3 states. [2020-12-22 09:43:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:45,545 INFO L93 Difference]: Finished difference Result 115746 states and 153835 transitions. [2020-12-22 09:43:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:45,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:45,580 INFO L225 Difference]: With dead ends: 115746 [2020-12-22 09:43:45,580 INFO L226 Difference]: Without dead ends: 27384 [2020-12-22 09:43:45,612 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 09:43:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27384 states. [2020-12-22 09:43:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27384 to 27382. [2020-12-22 09:43:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27382 states. [2020-12-22 09:43:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27382 states to 27382 states and 36783 transitions. [2020-12-22 09:43:48,178 INFO L78 Accepts]: Start accepts. Automaton has 27382 states and 36783 transitions. Word has length 81 [2020-12-22 09:43:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:48,179 INFO L481 AbstractCegarLoop]: Abstraction has 27382 states and 36783 transitions. [2020-12-22 09:43:48,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 27382 states and 36783 transitions. [2020-12-22 09:43:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:48,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:48,182 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 09:43:48,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:43:48,182 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:43:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:48,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601561182] [2020-12-22 09:43:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:48,257 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 09:43:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601561182] [2020-12-22 09:43:48,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:48,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:48,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540050840] [2020-12-22 09:43:48,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:48,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:48,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:48,259 INFO L87 Difference]: Start difference. First operand 27382 states and 36783 transitions. Second operand 6 states. [2020-12-22 09:43:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:50,080 INFO L93 Difference]: Finished difference Result 41424 states and 55329 transitions. [2020-12-22 09:43:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:50,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:43:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:50,100 INFO L225 Difference]: With dead ends: 41424 [2020-12-22 09:43:50,100 INFO L226 Difference]: Without dead ends: 16388 [2020-12-22 09:43:50,113 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 09:43:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2020-12-22 09:43:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 16388. [2020-12-22 09:43:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16388 states. [2020-12-22 09:43:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16388 states to 16388 states and 21978 transitions. [2020-12-22 09:43:51,654 INFO L78 Accepts]: Start accepts. Automaton has 16388 states and 21978 transitions. Word has length 81 [2020-12-22 09:43:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:51,654 INFO L481 AbstractCegarLoop]: Abstraction has 16388 states and 21978 transitions. [2020-12-22 09:43:51,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 16388 states and 21978 transitions. [2020-12-22 09:43:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:51,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:51,657 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 09:43:51,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:43:51,657 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:43:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:51,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697485237] [2020-12-22 09:43:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:51,730 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 09:43:51,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697485237] [2020-12-22 09:43:51,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:51,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:51,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767455113] [2020-12-22 09:43:51,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:51,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:51,732 INFO L87 Difference]: Start difference. First operand 16388 states and 21978 transitions. Second operand 6 states. [2020-12-22 09:43:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:54,330 INFO L93 Difference]: Finished difference Result 40760 states and 54034 transitions. [2020-12-22 09:43:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:54,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:43:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:54,365 INFO L225 Difference]: With dead ends: 40760 [2020-12-22 09:43:54,365 INFO L226 Difference]: Without dead ends: 26691 [2020-12-22 09:43:54,378 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 09:43:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26691 states. [2020-12-22 09:43:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26691 to 23873. [2020-12-22 09:43:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23873 states. [2020-12-22 09:43:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23873 states to 23873 states and 31655 transitions. [2020-12-22 09:43:56,701 INFO L78 Accepts]: Start accepts. Automaton has 23873 states and 31655 transitions. Word has length 81 [2020-12-22 09:43:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:56,701 INFO L481 AbstractCegarLoop]: Abstraction has 23873 states and 31655 transitions. [2020-12-22 09:43:56,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 23873 states and 31655 transitions. [2020-12-22 09:43:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:56,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:56,704 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 09:43:56,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:43:56,704 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:43:56,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:56,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886413633] [2020-12-22 09:43:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:56,755 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 09:43:56,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886413633] [2020-12-22 09:43:56,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:56,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390849487] [2020-12-22 09:43:56,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:56,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:56,757 INFO L87 Difference]: Start difference. First operand 23873 states and 31655 transitions. Second operand 3 states. [2020-12-22 09:43:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:57,950 INFO L93 Difference]: Finished difference Result 34677 states and 45599 transitions. [2020-12-22 09:43:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:57,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:43:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:57,967 INFO L225 Difference]: With dead ends: 34677 [2020-12-22 09:43:57,967 INFO L226 Difference]: Without dead ends: 13127 [2020-12-22 09:43:57,979 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 09:43:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2020-12-22 09:43:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 13125. [2020-12-22 09:43:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13125 states. [2020-12-22 09:43:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13125 states to 13125 states and 17377 transitions. [2020-12-22 09:43:59,099 INFO L78 Accepts]: Start accepts. Automaton has 13125 states and 17377 transitions. Word has length 82 [2020-12-22 09:43:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:59,099 INFO L481 AbstractCegarLoop]: Abstraction has 13125 states and 17377 transitions. [2020-12-22 09:43:59,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13125 states and 17377 transitions. [2020-12-22 09:43:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:43:59,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:59,101 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 09:43:59,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:43:59,101 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:43:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490138408] [2020-12-22 09:43:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:59,678 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 09:43:59,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490138408] [2020-12-22 09:43:59,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144188245] [2020-12-22 09:43:59,679 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 09:43:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:59,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 09:43:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:01,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 09:44:12,600 WARN L197 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 413 DAG size of output: 104 [2020-12-22 09:44:13,378 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-22 09:44:14,469 WARN L197 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:15,636 WARN L197 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-12-22 09:44:18,353 WARN L197 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-12-22 09:44:18,429 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:22,598 WARN L197 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 294 DAG size of output: 113 [2020-12-22 09:44:22,816 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:28,627 WARN L197 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 274 DAG size of output: 113 [2020-12-22 09:44:28,661 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 2 disjuncts [2020-12-22 09:44:28,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:28,764 INFO L639 QuantifierPusher]: Distributing 8 conjuncts over 3 disjuncts [2020-12-22 09:44:28,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 09:44:28,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:44:28,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 09:44:28,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251834944] [2020-12-22 09:44:28,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:44:28,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:44:28,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:44:28,772 INFO L87 Difference]: Start difference. First operand 13125 states and 17377 transitions. Second operand 13 states. [2020-12-22 09:44:29,735 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-12-22 09:44:29,991 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:30,234 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 09:44:30,682 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:44:31,010 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 09:44:31,628 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:44:31,916 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:44:32,252 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:44:32,533 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:44:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:34,119 INFO L93 Difference]: Finished difference Result 22249 states and 28804 transitions. [2020-12-22 09:44:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:44:34,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-12-22 09:44:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:34,140 INFO L225 Difference]: With dead ends: 22249 [2020-12-22 09:44:34,140 INFO L226 Difference]: Without dead ends: 18089 [2020-12-22 09:44:34,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 09:44:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2020-12-22 09:44:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 12599. [2020-12-22 09:44:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12599 states. [2020-12-22 09:44:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12599 states to 12599 states and 16657 transitions. [2020-12-22 09:44:35,355 INFO L78 Accepts]: Start accepts. Automaton has 12599 states and 16657 transitions. Word has length 83 [2020-12-22 09:44:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:35,355 INFO L481 AbstractCegarLoop]: Abstraction has 12599 states and 16657 transitions. [2020-12-22 09:44:35,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:44:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 12599 states and 16657 transitions. [2020-12-22 09:44:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:35,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:35,356 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 09:44:35,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:44:35,557 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:44:35,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:35,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12796319] [2020-12-22 09:44:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:36,120 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:36,460 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 09:44:36,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12796319] [2020-12-22 09:44:36,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528884615] [2020-12-22 09:44:36,461 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 09:44:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:44:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:37,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:37,554 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:44:38,250 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 09:44:38,318 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 09:44:38,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:38,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:38,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719255456] [2020-12-22 09:44:38,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:38,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:38,320 INFO L87 Difference]: Start difference. First operand 12599 states and 16657 transitions. Second operand 24 states. [2020-12-22 09:44:39,129 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-12-22 09:44:39,504 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-12-22 09:44:39,951 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:40,476 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:40,878 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:44:41,597 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-12-22 09:44:42,218 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:44:42,592 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 09:44:43,580 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-12-22 09:44:44,149 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:44:45,045 WARN L197 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-12-22 09:44:45,951 WARN L197 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-12-22 09:44:46,353 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:44:46,773 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 09:44:47,299 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:44:48,040 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:44:50,187 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-22 09:44:51,086 WARN L197 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-12-22 09:44:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:53,082 INFO L93 Difference]: Finished difference Result 37514 states and 47329 transitions. [2020-12-22 09:44:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 09:44:53,083 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2020-12-22 09:44:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:53,122 INFO L225 Difference]: With dead ends: 37514 [2020-12-22 09:44:53,122 INFO L226 Difference]: Without dead ends: 33335 [2020-12-22 09:44:53,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 09:44:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33335 states. [2020-12-22 09:44:55,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33335 to 18779. [2020-12-22 09:44:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18779 states. [2020-12-22 09:44:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 24309 transitions. [2020-12-22 09:44:55,561 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 24309 transitions. Word has length 83 [2020-12-22 09:44:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:55,561 INFO L481 AbstractCegarLoop]: Abstraction has 18779 states and 24309 transitions. [2020-12-22 09:44:55,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:44:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 24309 transitions. [2020-12-22 09:44:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:55,562 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:55,563 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 09:44:55,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:55,766 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:55,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1008179547, now seen corresponding path program 1 times [2020-12-22 09:44:55,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622452131] [2020-12-22 09:44:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:56,499 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:44:56,909 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 09:44:56,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622452131] [2020-12-22 09:44:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534533875] [2020-12-22 09:44:56,910 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 09:44:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:57,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:44:57,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:57,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:57,991 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-12-22 09:44:58,684 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 09:44:58,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:58,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:44:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886903073] [2020-12-22 09:44:58,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:44:58,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:44:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:44:58,687 INFO L87 Difference]: Start difference. First operand 18779 states and 24309 transitions. Second operand 24 states. [2020-12-22 09:44:58,915 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2020-12-22 09:44:59,395 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2020-12-22 09:44:59,673 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 24 [2020-12-22 09:45:00,157 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2020-12-22 09:45:00,591 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-12-22 09:45:01,120 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-12-22 09:45:01,461 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 09:45:01,829 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-12-22 09:45:02,216 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-12-22 09:45:02,451 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 09:45:02,807 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33