/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:45:14,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:45:14,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:45:14,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:45:14,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:45:14,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:45:14,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:45:14,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:45:14,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:45:14,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:45:14,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:45:14,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:45:14,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:45:14,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:45:14,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:45:14,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:45:14,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:45:14,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:45:14,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:45:14,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:45:14,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:45:14,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:45:14,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:45:14,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:45:14,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:45:14,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:45:14,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:45:14,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:45:14,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:45:14,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:45:14,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:45:14,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:45:14,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:45:14,626 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:45:14,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:45:14,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:45:14,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:45:14,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:45:14,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:45:14,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:45:14,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:45:14,628 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:45:14,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:45:14,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:45:14,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:45:14,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:45:14,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:14,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:45:14,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:45:14,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:45:15,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:45:15,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:45:15,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:45:15,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:45:15,085 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:45:15,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2020-12-22 09:45:15,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc95311b/c1febbdedd144b88ac2fda110cd36891/FLAG956ba89de [2020-12-22 09:45:16,166 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:45:16,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2020-12-22 09:45:16,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc95311b/c1febbdedd144b88ac2fda110cd36891/FLAG956ba89de [2020-12-22 09:45:16,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc95311b/c1febbdedd144b88ac2fda110cd36891 [2020-12-22 09:45:16,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:16,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:16,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:16,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:16,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:16,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:16" (1/1) ... [2020-12-22 09:45:16,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44149d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:16, skipping insertion in model container [2020-12-22 09:45:16,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:16" (1/1) ... [2020-12-22 09:45:16,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:16,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:17,171 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[8688,8701] [2020-12-22 09:45:17,213 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[9287,9300] [2020-12-22 09:45:18,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:18,422 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:45:18,485 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[8688,8701] [2020-12-22 09:45:18,489 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c[9287,9300] [2020-12-22 09:45:19,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:19,249 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:45:19,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19 WrapperNode [2020-12-22 09:45:19,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:19,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:19,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:45:19,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:45:19,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:19,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:19,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:19,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:45:19,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:45:19,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:45:19,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:19,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:19,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:19,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:20,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:20,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:20,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... [2020-12-22 09:45:20,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:45:20,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:45:20,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:45:20,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:45:20,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:45:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:45:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:45:20,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:45:26,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:45:26,694 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:45:26,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:26 BoogieIcfgContainer [2020-12-22 09:45:26,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:45:26,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:45:26,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:45:26,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:45:26,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:16" (1/3) ... [2020-12-22 09:45:26,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c00ee3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:26, skipping insertion in model container [2020-12-22 09:45:26,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:19" (2/3) ... [2020-12-22 09:45:26,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c00ee3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:26, skipping insertion in model container [2020-12-22 09:45:26,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:26" (3/3) ... [2020-12-22 09:45:26,707 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label07.c [2020-12-22 09:45:26,714 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:45:26,721 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:45:26,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:45:26,779 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:45:26,779 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:45:26,779 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:45:26,779 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:45:26,779 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:45:26,780 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:45:26,780 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:45:26,780 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:45:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:45:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:45:26,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:26,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:26,831 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2128631676, now seen corresponding path program 1 times [2020-12-22 09:45:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:26,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517249358] [2020-12-22 09:45:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517249358] [2020-12-22 09:45:27,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:27,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:27,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156748601] [2020-12-22 09:45:27,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:27,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:27,167 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 3 states. [2020-12-22 09:45:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,381 INFO L93 Difference]: Finished difference Result 2512 states and 4834 transitions. [2020-12-22 09:45:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:33,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:45:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,425 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:45:33,426 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:45:33,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:45:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:45:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:45:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2899 transitions. [2020-12-22 09:45:33,583 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2899 transitions. Word has length 7 [2020-12-22 09:45:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,584 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2899 transitions. [2020-12-22 09:45:33,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2899 transitions. [2020-12-22 09:45:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:33,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:33,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:45:33,587 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:45:33,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033941223] [2020-12-22 09:45:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:33,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033941223] [2020-12-22 09:45:33,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:33,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:33,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522521225] [2020-12-22 09:45:33,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:33,769 INFO L87 Difference]: Start difference. First operand 1578 states and 2899 transitions. Second operand 5 states. [2020-12-22 09:45:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,881 INFO L93 Difference]: Finished difference Result 1670 states and 3041 transitions. [2020-12-22 09:45:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:33,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:45:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,893 INFO L225 Difference]: With dead ends: 1670 [2020-12-22 09:45:33,893 INFO L226 Difference]: Without dead ends: 1622 [2020-12-22 09:45:33,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:45:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-12-22 09:45:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2020-12-22 09:45:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:45:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2876 transitions. [2020-12-22 09:45:33,942 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2876 transitions. Word has length 30 [2020-12-22 09:45:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,943 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2876 transitions. [2020-12-22 09:45:33,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2876 transitions. [2020-12-22 09:45:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:33,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:33,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:45:33,946 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:45:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435004393] [2020-12-22 09:45:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,122 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 09:45:34,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435004393] [2020-12-22 09:45:34,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623628805] [2020-12-22 09:45:34,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,125 INFO L87 Difference]: Start difference. First operand 1578 states and 2876 transitions. Second operand 3 states. [2020-12-22 09:45:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,172 INFO L93 Difference]: Finished difference Result 1660 states and 3004 transitions. [2020-12-22 09:45:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,183 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:45:34,184 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:45:34,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:45:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:45:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:45:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2933 transitions. [2020-12-22 09:45:34,231 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2933 transitions. Word has length 52 [2020-12-22 09:45:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,232 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2933 transitions. [2020-12-22 09:45:34,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2933 transitions. [2020-12-22 09:45:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:34,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:45:34,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:45:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61638347] [2020-12-22 09:45:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61638347] [2020-12-22 09:45:34,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427204726] [2020-12-22 09:45:34,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,316 INFO L87 Difference]: Start difference. First operand 1614 states and 2933 transitions. Second operand 3 states. [2020-12-22 09:45:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,366 INFO L93 Difference]: Finished difference Result 1762 states and 3165 transitions. [2020-12-22 09:45:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,379 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:45:34,380 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:45:34,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:45:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:45:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:45:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3036 transitions. [2020-12-22 09:45:34,433 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3036 transitions. Word has length 52 [2020-12-22 09:45:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,434 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 3036 transitions. [2020-12-22 09:45:34,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3036 transitions. [2020-12-22 09:45:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:34,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:45:34,437 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:45:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946686667] [2020-12-22 09:45:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946686667] [2020-12-22 09:45:34,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624360219] [2020-12-22 09:45:34,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,554 INFO L87 Difference]: Start difference. First operand 1680 states and 3036 transitions. Second operand 3 states. [2020-12-22 09:45:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,608 INFO L93 Difference]: Finished difference Result 1948 states and 3454 transitions. [2020-12-22 09:45:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,622 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:45:34,622 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:45:34,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:45:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:45:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:45:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3220 transitions. [2020-12-22 09:45:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3220 transitions. Word has length 52 [2020-12-22 09:45:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,682 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 3220 transitions. [2020-12-22 09:45:34,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3220 transitions. [2020-12-22 09:45:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:34,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:45:34,687 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:45:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127437254] [2020-12-22 09:45:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127437254] [2020-12-22 09:45:34,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044346803] [2020-12-22 09:45:34,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,788 INFO L87 Difference]: Start difference. First operand 1800 states and 3220 transitions. Second operand 3 states. [2020-12-22 09:45:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,857 INFO L93 Difference]: Finished difference Result 2284 states and 3966 transitions. [2020-12-22 09:45:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,874 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:45:34,875 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:45:34,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:45:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:45:34,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:45:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3544 transitions. [2020-12-22 09:45:34,955 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3544 transitions. Word has length 52 [2020-12-22 09:45:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,957 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3544 transitions. [2020-12-22 09:45:34,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3544 transitions. [2020-12-22 09:45:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:34,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:45:34,962 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:45:34,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922934729] [2020-12-22 09:45:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:35,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922934729] [2020-12-22 09:45:35,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:35,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:35,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477277753] [2020-12-22 09:45:35,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:35,103 INFO L87 Difference]: Start difference. First operand 2016 states and 3544 transitions. Second operand 6 states. [2020-12-22 09:45:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,449 INFO L93 Difference]: Finished difference Result 5872 states and 9440 transitions. [2020-12-22 09:45:35,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:45:35,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:45:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,481 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:45:35,481 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:45:35,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:45:35,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:45:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:45:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:45:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4248 transitions. [2020-12-22 09:45:35,631 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4248 transitions. Word has length 52 [2020-12-22 09:45:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:35,631 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 4248 transitions. [2020-12-22 09:45:35,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4248 transitions. [2020-12-22 09:45:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:35,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:35,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:45:35,633 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:45:35,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:35,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845276605] [2020-12-22 09:45:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:35,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845276605] [2020-12-22 09:45:35,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:35,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073439047] [2020-12-22 09:45:35,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:35,732 INFO L87 Difference]: Start difference. First operand 2496 states and 4248 transitions. Second operand 3 states. [2020-12-22 09:45:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,857 INFO L93 Difference]: Finished difference Result 3902 states and 6348 transitions. [2020-12-22 09:45:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:35,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:45:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,878 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:45:35,878 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:35,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4882 transitions. [2020-12-22 09:45:36,020 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4882 transitions. Word has length 54 [2020-12-22 09:45:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:36,021 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4882 transitions. [2020-12-22 09:45:36,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4882 transitions. [2020-12-22 09:45:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:36,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:36,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:36,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:45:36,023 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:36,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:45:36,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:36,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940312655] [2020-12-22 09:45:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:36,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940312655] [2020-12-22 09:45:36,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:36,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28214739] [2020-12-22 09:45:36,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:36,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:36,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:36,291 INFO L87 Difference]: Start difference. First operand 2938 states and 4882 transitions. Second operand 6 states. [2020-12-22 09:45:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:36,531 INFO L93 Difference]: Finished difference Result 4342 states and 6956 transitions. [2020-12-22 09:45:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:36,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:45:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:36,548 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:45:36,548 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:36,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4858 transitions. [2020-12-22 09:45:36,694 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4858 transitions. Word has length 54 [2020-12-22 09:45:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:36,694 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4858 transitions. [2020-12-22 09:45:36,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4858 transitions. [2020-12-22 09:45:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:36,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:36,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:36,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:45:36,696 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:45:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:36,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115346267] [2020-12-22 09:45:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:36,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115346267] [2020-12-22 09:45:36,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983979315] [2020-12-22 09:45:36,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:36,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:36,800 INFO L87 Difference]: Start difference. First operand 2938 states and 4858 transitions. Second operand 6 states. [2020-12-22 09:45:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,043 INFO L93 Difference]: Finished difference Result 4340 states and 6907 transitions. [2020-12-22 09:45:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:37,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,076 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:37,077 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:37,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4834 transitions. [2020-12-22 09:45:37,237 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4834 transitions. Word has length 55 [2020-12-22 09:45:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:37,238 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4834 transitions. [2020-12-22 09:45:37,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4834 transitions. [2020-12-22 09:45:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:37,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:37,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:37,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:45:37,239 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:45:37,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:37,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411475243] [2020-12-22 09:45:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411475243] [2020-12-22 09:45:37,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:37,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:37,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481912575] [2020-12-22 09:45:37,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:37,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:37,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:37,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:37,337 INFO L87 Difference]: Start difference. First operand 2938 states and 4834 transitions. Second operand 6 states. [2020-12-22 09:45:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,588 INFO L93 Difference]: Finished difference Result 4340 states and 6859 transitions. [2020-12-22 09:45:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:37,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,598 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:37,598 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:37,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4810 transitions. [2020-12-22 09:45:37,763 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4810 transitions. Word has length 55 [2020-12-22 09:45:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:37,763 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4810 transitions. [2020-12-22 09:45:37,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4810 transitions. [2020-12-22 09:45:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:37,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:37,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:37,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:45:37,765 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:45:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:37,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194492238] [2020-12-22 09:45:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:37,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194492238] [2020-12-22 09:45:37,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:37,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:37,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335715790] [2020-12-22 09:45:37,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:37,848 INFO L87 Difference]: Start difference. First operand 2938 states and 4810 transitions. Second operand 5 states. [2020-12-22 09:45:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:38,167 INFO L93 Difference]: Finished difference Result 4169 states and 6508 transitions. [2020-12-22 09:45:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:45:38,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:45:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:38,178 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:45:38,178 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:45:38,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:45:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:45:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:45:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4898 transitions. [2020-12-22 09:45:38,378 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4898 transitions. Word has length 55 [2020-12-22 09:45:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:38,379 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4898 transitions. [2020-12-22 09:45:38,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4898 transitions. [2020-12-22 09:45:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:45:38,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:38,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:38,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:45:38,390 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:38,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1698168162, now seen corresponding path program 1 times [2020-12-22 09:45:38,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:38,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008435724] [2020-12-22 09:45:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008435724] [2020-12-22 09:45:38,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:38,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671203555] [2020-12-22 09:45:38,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:38,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:38,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:38,473 INFO L87 Difference]: Start difference. First operand 3034 states and 4898 transitions. Second operand 3 states. [2020-12-22 09:45:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:43,984 INFO L93 Difference]: Finished difference Result 5289 states and 9013 transitions. [2020-12-22 09:45:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:43,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:45:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:43,993 INFO L225 Difference]: With dead ends: 5289 [2020-12-22 09:45:43,993 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:45:43,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:45:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:45:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:45:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5373 transitions. [2020-12-22 09:45:44,166 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5373 transitions. Word has length 76 [2020-12-22 09:45:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:44,166 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5373 transitions. [2020-12-22 09:45:44,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5373 transitions. [2020-12-22 09:45:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:45:44,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:44,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:44,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:45:44,169 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -102888099, now seen corresponding path program 1 times [2020-12-22 09:45:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:44,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761657833] [2020-12-22 09:45:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 09:45:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761657833] [2020-12-22 09:45:44,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:44,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:44,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805993865] [2020-12-22 09:45:44,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:44,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:44,240 INFO L87 Difference]: Start difference. First operand 3785 states and 5373 transitions. Second operand 3 states. [2020-12-22 09:45:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:50,339 INFO L93 Difference]: Finished difference Result 8293 states and 11874 transitions. [2020-12-22 09:45:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:50,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 09:45:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:50,354 INFO L225 Difference]: With dead ends: 8293 [2020-12-22 09:45:50,354 INFO L226 Difference]: Without dead ends: 6038 [2020-12-22 09:45:50,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2020-12-22 09:45:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 6038. [2020-12-22 09:45:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6038 states. [2020-12-22 09:45:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 7950 transitions. [2020-12-22 09:45:50,549 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 7950 transitions. Word has length 78 [2020-12-22 09:45:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:50,550 INFO L481 AbstractCegarLoop]: Abstraction has 6038 states and 7950 transitions. [2020-12-22 09:45:50,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 7950 transitions. [2020-12-22 09:45:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:50,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:50,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:50,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:50,553 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:45:50,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:50,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705546922] [2020-12-22 09:45:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:45:50,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705546922] [2020-12-22 09:45:50,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:50,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:50,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868110905] [2020-12-22 09:45:50,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:50,665 INFO L87 Difference]: Start difference. First operand 6038 states and 7950 transitions. Second operand 6 states. [2020-12-22 09:45:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:51,242 INFO L93 Difference]: Finished difference Result 12344 states and 16719 transitions. [2020-12-22 09:45:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:51,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:51,268 INFO L225 Difference]: With dead ends: 12344 [2020-12-22 09:45:51,268 INFO L226 Difference]: Without dead ends: 10846 [2020-12-22 09:45:51,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10846 states. [2020-12-22 09:45:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10846 to 7534. [2020-12-22 09:45:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7534 states. [2020-12-22 09:45:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7534 states to 7534 states and 10014 transitions. [2020-12-22 09:45:51,639 INFO L78 Accepts]: Start accepts. Automaton has 7534 states and 10014 transitions. Word has length 79 [2020-12-22 09:45:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:51,639 INFO L481 AbstractCegarLoop]: Abstraction has 7534 states and 10014 transitions. [2020-12-22 09:45:51,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7534 states and 10014 transitions. [2020-12-22 09:45:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:51,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:51,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:51,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:51,642 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:45:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:51,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731615728] [2020-12-22 09:45:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:45:51,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731615728] [2020-12-22 09:45:51,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:51,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:51,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761809262] [2020-12-22 09:45:51,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:51,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:51,755 INFO L87 Difference]: Start difference. First operand 7534 states and 10014 transitions. Second operand 6 states. [2020-12-22 09:45:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:52,391 INFO L93 Difference]: Finished difference Result 13840 states and 18783 transitions. [2020-12-22 09:45:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:52,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:52,419 INFO L225 Difference]: With dead ends: 13840 [2020-12-22 09:45:52,419 INFO L226 Difference]: Without dead ends: 12342 [2020-12-22 09:45:52,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12342 states. [2020-12-22 09:45:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12342 to 9782. [2020-12-22 09:45:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9782 states. [2020-12-22 09:45:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9782 states to 9782 states and 13090 transitions. [2020-12-22 09:45:52,893 INFO L78 Accepts]: Start accepts. Automaton has 9782 states and 13090 transitions. Word has length 79 [2020-12-22 09:45:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:52,894 INFO L481 AbstractCegarLoop]: Abstraction has 9782 states and 13090 transitions. [2020-12-22 09:45:52,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 9782 states and 13090 transitions. [2020-12-22 09:45:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:52,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:52,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:52,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:52,898 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:52,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:45:52,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:52,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703128786] [2020-12-22 09:45:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:45:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703128786] [2020-12-22 09:45:52,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:52,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565548730] [2020-12-22 09:45:52,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:52,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:52,990 INFO L87 Difference]: Start difference. First operand 9782 states and 13090 transitions. Second operand 6 states. [2020-12-22 09:45:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:53,661 INFO L93 Difference]: Finished difference Result 15336 states and 20847 transitions. [2020-12-22 09:45:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:53,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:53,687 INFO L225 Difference]: With dead ends: 15336 [2020-12-22 09:45:53,688 INFO L226 Difference]: Without dead ends: 13838 [2020-12-22 09:45:53,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13838 states. [2020-12-22 09:45:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13838 to 11278. [2020-12-22 09:45:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11278 states. [2020-12-22 09:45:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11278 states to 11278 states and 15154 transitions. [2020-12-22 09:45:54,204 INFO L78 Accepts]: Start accepts. Automaton has 11278 states and 15154 transitions. Word has length 79 [2020-12-22 09:45:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:54,204 INFO L481 AbstractCegarLoop]: Abstraction has 11278 states and 15154 transitions. [2020-12-22 09:45:54,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 11278 states and 15154 transitions. [2020-12-22 09:45:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:54,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:54,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:54,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:45:54,208 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:45:54,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:54,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340219756] [2020-12-22 09:45:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:54,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340219756] [2020-12-22 09:45:54,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:54,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981224824] [2020-12-22 09:45:54,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:54,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:54,301 INFO L87 Difference]: Start difference. First operand 11278 states and 15154 transitions. Second operand 6 states. [2020-12-22 09:45:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:54,979 INFO L93 Difference]: Finished difference Result 15952 states and 21711 transitions. [2020-12-22 09:45:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:54,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:55,004 INFO L225 Difference]: With dead ends: 15952 [2020-12-22 09:45:55,005 INFO L226 Difference]: Without dead ends: 14894 [2020-12-22 09:45:55,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14894 states. [2020-12-22 09:45:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14894 to 12334. [2020-12-22 09:45:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12334 states. [2020-12-22 09:45:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12334 states to 12334 states and 16626 transitions. [2020-12-22 09:45:55,668 INFO L78 Accepts]: Start accepts. Automaton has 12334 states and 16626 transitions. Word has length 79 [2020-12-22 09:45:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:55,669 INFO L481 AbstractCegarLoop]: Abstraction has 12334 states and 16626 transitions. [2020-12-22 09:45:55,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12334 states and 16626 transitions. [2020-12-22 09:45:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:55,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:55,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:55,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:45:55,673 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:45:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:55,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059055075] [2020-12-22 09:45:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059055075] [2020-12-22 09:45:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008592462] [2020-12-22 09:45:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:56,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:57,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:57,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:45:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733908544] [2020-12-22 09:45:57,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:45:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:45:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:45:57,050 INFO L87 Difference]: Start difference. First operand 12334 states and 16626 transitions. Second operand 18 states. [2020-12-22 09:45:57,246 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:00,679 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:01,349 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:01,617 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:46:02,951 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:04,027 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:46:04,388 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:04,546 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:07,064 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:07,670 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:07,844 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:08,311 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:08,798 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:46:09,215 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:09,945 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:46:11,340 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:11,985 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:12,206 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:12,533 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:16,594 INFO L93 Difference]: Finished difference Result 88954 states and 120721 transitions. [2020-12-22 09:46:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:46:16,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:46:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:16,802 INFO L225 Difference]: With dead ends: 88954 [2020-12-22 09:46:16,803 INFO L226 Difference]: Without dead ends: 81160 [2020-12-22 09:46:16,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:46:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2020-12-22 09:46:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 38950. [2020-12-22 09:46:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38950 states. [2020-12-22 09:46:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38950 states to 38950 states and 53144 transitions. [2020-12-22 09:46:21,021 INFO L78 Accepts]: Start accepts. Automaton has 38950 states and 53144 transitions. Word has length 80 [2020-12-22 09:46:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:21,022 INFO L481 AbstractCegarLoop]: Abstraction has 38950 states and 53144 transitions. [2020-12-22 09:46:21,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 38950 states and 53144 transitions. [2020-12-22 09:46:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:21,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:21,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:21,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:21,244 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186955713] [2020-12-22 09:46:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:21,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186955713] [2020-12-22 09:46:21,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:21,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830919646] [2020-12-22 09:46:21,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:21,369 INFO L87 Difference]: Start difference. First operand 38950 states and 53144 transitions. Second operand 3 states. [2020-12-22 09:46:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:24,156 INFO L93 Difference]: Finished difference Result 73362 states and 100428 transitions. [2020-12-22 09:46:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:24,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:24,195 INFO L225 Difference]: With dead ends: 73362 [2020-12-22 09:46:24,196 INFO L226 Difference]: Without dead ends: 38952 [2020-12-22 09:46:24,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38952 states. [2020-12-22 09:46:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38952 to 37990. [2020-12-22 09:46:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37990 states. [2020-12-22 09:46:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37990 states to 37990 states and 51104 transitions. [2020-12-22 09:46:27,542 INFO L78 Accepts]: Start accepts. Automaton has 37990 states and 51104 transitions. Word has length 81 [2020-12-22 09:46:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:27,543 INFO L481 AbstractCegarLoop]: Abstraction has 37990 states and 51104 transitions. [2020-12-22 09:46:27,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 37990 states and 51104 transitions. [2020-12-22 09:46:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:27,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:27,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:27,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:46:27,547 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:27,547 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:46:27,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:27,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940873478] [2020-12-22 09:46:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:27,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940873478] [2020-12-22 09:46:27,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914029497] [2020-12-22 09:46:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:28,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:28,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:28,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:46:28,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50079657] [2020-12-22 09:46:28,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:46:28,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:46:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:46:28,537 INFO L87 Difference]: Start difference. First operand 37990 states and 51104 transitions. Second operand 19 states. [2020-12-22 09:46:28,718 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:28,854 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:46:29,014 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:29,179 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:46:29,356 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:29,954 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:30,172 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2020-12-22 09:46:30,328 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:30,595 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:31,277 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:31,563 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:31,834 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:32,108 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:32,447 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:32,823 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:33,468 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:36,236 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:36,638 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:36,794 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:37,214 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:37,362 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:37,511 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:37,805 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:38,459 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:38,723 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:39,113 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:39,519 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:40,104 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:40,616 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:40,816 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:41,288 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:41,439 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:43,026 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:43,501 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:43,897 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:48,108 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:46:48,927 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:49,613 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:50,094 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:50,281 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:51,053 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:51,374 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:51,990 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:52,267 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:52,457 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:01,550 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:02,203 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:06,250 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:06,724 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:11,481 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:47:11,841 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:17,198 INFO L93 Difference]: Finished difference Result 375073 states and 498374 transitions. [2020-12-22 09:47:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:47:17,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:47:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:17,919 INFO L225 Difference]: With dead ends: 375073 [2020-12-22 09:47:17,920 INFO L226 Difference]: Without dead ends: 341623 [2020-12-22 09:47:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:47:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341623 states. [2020-12-22 09:47:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341623 to 169488. [2020-12-22 09:47:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169488 states. [2020-12-22 09:47:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169488 states to 169488 states and 227224 transitions. [2020-12-22 09:47:36,176 INFO L78 Accepts]: Start accepts. Automaton has 169488 states and 227224 transitions. Word has length 81 [2020-12-22 09:47:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:36,176 INFO L481 AbstractCegarLoop]: Abstraction has 169488 states and 227224 transitions. [2020-12-22 09:47:36,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:47:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 169488 states and 227224 transitions. [2020-12-22 09:47:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:36,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:36,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:36,649 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:47:36,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:36,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727810571] [2020-12-22 09:47:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:36,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727810571] [2020-12-22 09:47:36,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:36,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478662543] [2020-12-22 09:47:36,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:36,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:36,740 INFO L87 Difference]: Start difference. First operand 169488 states and 227224 transitions. Second operand 3 states. [2020-12-22 09:47:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:46,194 INFO L93 Difference]: Finished difference Result 261052 states and 349740 transitions. [2020-12-22 09:47:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:46,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:46,366 INFO L225 Difference]: With dead ends: 261052 [2020-12-22 09:47:46,367 INFO L226 Difference]: Without dead ends: 96104 [2020-12-22 09:47:46,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96104 states. [2020-12-22 09:47:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96104 to 96102. [2020-12-22 09:47:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96102 states. [2020-12-22 09:47:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96102 states to 96102 states and 126680 transitions. [2020-12-22 09:47:55,806 INFO L78 Accepts]: Start accepts. Automaton has 96102 states and 126680 transitions. Word has length 81 [2020-12-22 09:47:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:55,806 INFO L481 AbstractCegarLoop]: Abstraction has 96102 states and 126680 transitions. [2020-12-22 09:47:55,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 96102 states and 126680 transitions. [2020-12-22 09:47:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:55,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:55,812 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:55,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:55,812 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:47:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:55,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752838715] [2020-12-22 09:47:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:55,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752838715] [2020-12-22 09:47:55,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:55,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190429536] [2020-12-22 09:47:55,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:55,870 INFO L87 Difference]: Start difference. First operand 96102 states and 126680 transitions. Second operand 3 states. [2020-12-22 09:48:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:00,068 INFO L93 Difference]: Finished difference Result 138083 states and 182548 transitions. [2020-12-22 09:48:00,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:00,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:00,125 INFO L225 Difference]: With dead ends: 138083 [2020-12-22 09:48:00,125 INFO L226 Difference]: Without dead ends: 46521 [2020-12-22 09:48:00,164 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 09:48:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2020-12-22 09:48:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 46495. [2020-12-22 09:48:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46495 states. [2020-12-22 09:48:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46495 states to 46495 states and 60908 transitions. [2020-12-22 09:48:04,404 INFO L78 Accepts]: Start accepts. Automaton has 46495 states and 60908 transitions. Word has length 81 [2020-12-22 09:48:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:04,404 INFO L481 AbstractCegarLoop]: Abstraction has 46495 states and 60908 transitions. [2020-12-22 09:48:04,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 46495 states and 60908 transitions. [2020-12-22 09:48:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:04,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:04,414 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 09:48:04,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:48:04,414 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:48:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:04,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741424115] [2020-12-22 09:48:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:04,513 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 09:48:04,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741424115] [2020-12-22 09:48:04,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:04,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734986418] [2020-12-22 09:48:04,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:04,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:04,516 INFO L87 Difference]: Start difference. First operand 46495 states and 60908 transitions. Second operand 6 states. [2020-12-22 09:48:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:07,720 INFO L93 Difference]: Finished difference Result 69817 states and 91478 transitions. [2020-12-22 09:48:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:07,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:07,753 INFO L225 Difference]: With dead ends: 69817 [2020-12-22 09:48:07,753 INFO L226 Difference]: Without dead ends: 27899 [2020-12-22 09:48:07,769 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 09:48:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27899 states. [2020-12-22 09:48:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27899 to 27899. [2020-12-22 09:48:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27899 states. [2020-12-22 09:48:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27899 states to 27899 states and 36073 transitions. [2020-12-22 09:48:10,321 INFO L78 Accepts]: Start accepts. Automaton has 27899 states and 36073 transitions. Word has length 81 [2020-12-22 09:48:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:10,321 INFO L481 AbstractCegarLoop]: Abstraction has 27899 states and 36073 transitions. [2020-12-22 09:48:10,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27899 states and 36073 transitions. [2020-12-22 09:48:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:10,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:10,323 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 09:48:10,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:48:10,323 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:10,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:48:10,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:10,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226416369] [2020-12-22 09:48:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:10,425 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 09:48:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226416369] [2020-12-22 09:48:10,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:10,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:10,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572204556] [2020-12-22 09:48:10,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:10,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:10,427 INFO L87 Difference]: Start difference. First operand 27899 states and 36073 transitions. Second operand 6 states. [2020-12-22 09:48:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:13,112 INFO L93 Difference]: Finished difference Result 46469 states and 60208 transitions. [2020-12-22 09:48:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:13,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:48:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:13,137 INFO L225 Difference]: With dead ends: 46469 [2020-12-22 09:48:13,138 INFO L226 Difference]: Without dead ends: 23129 [2020-12-22 09:48:13,149 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 09:48:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23129 states. [2020-12-22 09:48:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23129 to 23129. [2020-12-22 09:48:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23129 states. [2020-12-22 09:48:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23129 states to 23129 states and 29751 transitions. [2020-12-22 09:48:15,305 INFO L78 Accepts]: Start accepts. Automaton has 23129 states and 29751 transitions. Word has length 81 [2020-12-22 09:48:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:15,305 INFO L481 AbstractCegarLoop]: Abstraction has 23129 states and 29751 transitions. [2020-12-22 09:48:15,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 23129 states and 29751 transitions. [2020-12-22 09:48:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:15,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:15,307 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 09:48:15,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:48:15,307 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:15,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:48:15,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:15,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468440828] [2020-12-22 09:48:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:15,369 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 09:48:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468440828] [2020-12-22 09:48:15,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:15,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:15,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920178344] [2020-12-22 09:48:15,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:15,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:15,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:15,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:15,372 INFO L87 Difference]: Start difference. First operand 23129 states and 29751 transitions. Second operand 3 states. [2020-12-22 09:48:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:16,650 INFO L93 Difference]: Finished difference Result 32505 states and 41721 transitions. [2020-12-22 09:48:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:16,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:48:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:16,668 INFO L225 Difference]: With dead ends: 32505 [2020-12-22 09:48:16,669 INFO L226 Difference]: Without dead ends: 13935 [2020-12-22 09:48:16,679 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 09:48:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13935 states. [2020-12-22 09:48:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13935 to 13933. [2020-12-22 09:48:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13933 states. [2020-12-22 09:48:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13933 states to 13933 states and 17673 transitions. [2020-12-22 09:48:17,839 INFO L78 Accepts]: Start accepts. Automaton has 13933 states and 17673 transitions. Word has length 82 [2020-12-22 09:48:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:17,840 INFO L481 AbstractCegarLoop]: Abstraction has 13933 states and 17673 transitions. [2020-12-22 09:48:17,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 13933 states and 17673 transitions. [2020-12-22 09:48:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:17,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:17,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:17,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:48:17,842 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:48:17,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:17,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748969087] [2020-12-22 09:48:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:18,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748969087] [2020-12-22 09:48:18,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986588856] [2020-12-22 09:48:18,638 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 09:48:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:48:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:20,091 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:48:20,287 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:48:20,916 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:21,191 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:21,620 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:48:21,936 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:22,297 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:22,319 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:22,835 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:23,243 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:23,274 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:23,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:23,309 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:23,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:23,317 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:23,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:23,326 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:23,329 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:24,566 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:25,186 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:48:25,688 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:48:25,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:26,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:29,331 WARN L197 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:48:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:29,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:29,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:48:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948405620] [2020-12-22 09:48:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:48:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:48:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:48:29,908 INFO L87 Difference]: Start difference. First operand 13933 states and 17673 transitions. Second operand 39 states. [2020-12-22 09:48:31,398 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-12-22 09:48:31,665 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:48:31,898 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:48:32,184 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:48:32,571 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:48:33,135 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:48:33,564 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:48:34,003 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:48:34,481 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:48:35,042 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:48:35,621 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:48:36,171 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:48:36,769 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:48:37,362 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:48:38,130 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:48:38,948 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:48:40,426 WARN L197 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:48:41,240 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:48:42,592 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:48:43,513 WARN L197 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:48:44,215 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:48:44,794 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:48:45,045 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:45,734 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:48:46,203 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:48:46,620 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:48:46,997 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:48,567 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:48:48,808 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:49,248 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:50,457 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:48:51,100 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:48:51,590 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:48:52,007 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:48:53,074 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:48:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:56,065 INFO L93 Difference]: Finished difference Result 27474 states and 34302 transitions. [2020-12-22 09:48:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:48:56,066 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:48:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:56,089 INFO L225 Difference]: With dead ends: 27474 [2020-12-22 09:48:56,089 INFO L226 Difference]: Without dead ends: 24064 [2020-12-22 09:48:56,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:48:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24064 states. [2020-12-22 09:48:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24064 to 13385. [2020-12-22 09:48:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13385 states. [2020-12-22 09:48:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13385 states to 13385 states and 16945 transitions. [2020-12-22 09:48:57,366 INFO L78 Accepts]: Start accepts. Automaton has 13385 states and 16945 transitions. Word has length 83 [2020-12-22 09:48:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:57,366 INFO L481 AbstractCegarLoop]: Abstraction has 13385 states and 16945 transitions. [2020-12-22 09:48:57,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:48:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13385 states and 16945 transitions. [2020-12-22 09:48:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:57,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:57,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:57,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:48:57,579 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:48:57,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:57,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860840920] [2020-12-22 09:48:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:58,186 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860840920] [2020-12-22 09:48:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938921921] [2020-12-22 09:48:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:48:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates...