/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.5.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:58:56,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:58:56,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:58:56,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:58:56,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:58:56,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:58:56,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:58:56,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:58:56,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:58:56,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:58:56,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:58:56,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:58:56,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:58:56,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:58:56,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:58:56,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:58:56,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:58:56,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:58:56,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:58:56,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:58:56,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:58:56,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:58:56,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:58:56,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:58:56,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:58:56,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:58:56,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:58:56,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:58:56,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:58:56,554 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:58:56,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:58:56,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:58:56,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:58:56,558 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:58:56,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:58:56,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:58:56,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:58:56,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:58:56,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:58:56,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:58:56,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:58:56,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:58:56,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:58:56,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:58:56,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:58:56,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:58:56,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:58:56,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:58:56,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:58:56,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:58:56,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:58:56,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:58:56,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:58:56,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:58:56,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:58:56,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:58:57,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:58:57,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:58:57,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:58:57,020 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:58:57,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:58:57,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2556f0/c676ef419118483eb53587b457abfd90/FLAGbdd25a86a [2020-12-22 09:58:58,046 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:58:58,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:58:58,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2556f0/c676ef419118483eb53587b457abfd90/FLAGbdd25a86a [2020-12-22 09:58:58,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2556f0/c676ef419118483eb53587b457abfd90 [2020-12-22 09:58:58,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:58:58,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:58:58,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:58:58,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:58:58,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:58:58,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:58:58" (1/1) ... [2020-12-22 09:58:58,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba69905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:58:58, skipping insertion in model container [2020-12-22 09:58:58,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:58:58" (1/1) ... [2020-12-22 09:58:58,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:58:58,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:58:59,052 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.5.ufo.UNBOUNDED.pals+Problem12_label09.c[11758,11771] [2020-12-22 09:58:59,165 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.5.ufo.UNBOUNDED.pals+Problem12_label09.c[19263,19276] [2020-12-22 09:59:00,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:00,163 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:59:00,289 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.5.ufo.UNBOUNDED.pals+Problem12_label09.c[11758,11771] [2020-12-22 09:59:00,302 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.5.ufo.UNBOUNDED.pals+Problem12_label09.c[19263,19276] [2020-12-22 09:59:00,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:59:00,959 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:59:00,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00 WrapperNode [2020-12-22 09:59:00,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:59:00,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:00,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:59:00,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:59:00,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:59:01,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:59:01,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:59:01,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:59:01,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:01,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (1/1) ... [2020-12-22 09:59:02,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:59:02,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:59:02,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:59:02,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:59:02,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (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 09:59:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:59:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:59:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:59:02,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:59:07,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:59:07,575 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:59:07,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:07 BoogieIcfgContainer [2020-12-22 09:59:07,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:59:07,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:59:07,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:59:07,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:59:07,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:58:58" (1/3) ... [2020-12-22 09:59:07,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511b9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:07, skipping insertion in model container [2020-12-22 09:59:07,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:59:00" (2/3) ... [2020-12-22 09:59:07,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511b9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:59:07, skipping insertion in model container [2020-12-22 09:59:07,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:59:07" (3/3) ... [2020-12-22 09:59:07,587 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 09:59:07,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:59:07,600 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:59:07,620 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:59:07,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:59:07,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:59:07,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:59:07,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:59:07,655 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:59:07,655 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:59:07,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:59:07,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:59:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:59:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:07,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:07,700 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] [2020-12-22 09:59:07,701 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:59:07,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:07,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022679423] [2020-12-22 09:59:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:08,073 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 09:59:08,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022679423] [2020-12-22 09:59:08,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:08,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:59:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148187928] [2020-12-22 09:59:08,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:59:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:59:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:08,107 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:59:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:08,211 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:59:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:59:08,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:59:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:08,252 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:59:08,252 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:59:08,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:59:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:59:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:59:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:59:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:59:08,377 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:59:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:08,377 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:59:08,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:59:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:59:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:59:08,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:08,380 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] [2020-12-22 09:59:08,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:59:08,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:59:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599965263] [2020-12-22 09:59:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:08,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599965263] [2020-12-22 09:59:08,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:08,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895627805] [2020-12-22 09:59:08,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:08,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:08,572 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:59:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:08,700 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:59:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:59:08,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:59:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:08,709 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:59:08,710 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:59:08,711 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 09:59:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:59:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:59:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:59:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:59:08,749 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:59:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:08,749 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:59:08,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:59:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:08,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:08,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:08,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:59:08,758 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:08,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:59:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:08,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704201452] [2020-12-22 09:59:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:08,914 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 09:59:08,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704201452] [2020-12-22 09:59:08,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:08,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015206781] [2020-12-22 09:59:08,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:08,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:08,918 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 3 states. [2020-12-22 09:59:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:08,958 INFO L93 Difference]: Finished difference Result 944 states and 1718 transitions. [2020-12-22 09:59:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:08,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:59:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:08,965 INFO L225 Difference]: With dead ends: 944 [2020-12-22 09:59:08,965 INFO L226 Difference]: Without dead ends: 891 [2020-12-22 09:59:08,966 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 09:59:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-12-22 09:59:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2020-12-22 09:59:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2020-12-22 09:59:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1632 transitions. [2020-12-22 09:59:08,993 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1632 transitions. Word has length 64 [2020-12-22 09:59:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:08,994 INFO L481 AbstractCegarLoop]: Abstraction has 889 states and 1632 transitions. [2020-12-22 09:59:08,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1632 transitions. [2020-12-22 09:59:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:59:08,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:08,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:08,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:59:08,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:59:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:08,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25675194] [2020-12-22 09:59:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:09,113 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 09:59:09,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25675194] [2020-12-22 09:59:09,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:09,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503774657] [2020-12-22 09:59:09,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:09,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:09,116 INFO L87 Difference]: Start difference. First operand 889 states and 1632 transitions. Second operand 7 states. [2020-12-22 09:59:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:09,490 INFO L93 Difference]: Finished difference Result 1869 states and 3192 transitions. [2020-12-22 09:59:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:59:09,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:59:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:09,503 INFO L225 Difference]: With dead ends: 1869 [2020-12-22 09:59:09,503 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:59:09,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:59:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:59:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 985. [2020-12-22 09:59:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-12-22 09:59:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1783 transitions. [2020-12-22 09:59:09,550 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1783 transitions. Word has length 64 [2020-12-22 09:59:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:09,551 INFO L481 AbstractCegarLoop]: Abstraction has 985 states and 1783 transitions. [2020-12-22 09:59:09,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1783 transitions. [2020-12-22 09:59:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:09,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:09,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:09,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:59:09,554 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:59:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:09,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21808377] [2020-12-22 09:59:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:09,693 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 09:59:09,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21808377] [2020-12-22 09:59:09,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:09,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:09,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813700703] [2020-12-22 09:59:09,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:09,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:09,701 INFO L87 Difference]: Start difference. First operand 985 states and 1783 transitions. Second operand 3 states. [2020-12-22 09:59:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:09,773 INFO L93 Difference]: Finished difference Result 1351 states and 2359 transitions. [2020-12-22 09:59:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:09,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:09,786 INFO L225 Difference]: With dead ends: 1351 [2020-12-22 09:59:09,786 INFO L226 Difference]: Without dead ends: 1157 [2020-12-22 09:59:09,787 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 09:59:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2020-12-22 09:59:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1151. [2020-12-22 09:59:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 09:59:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2037 transitions. [2020-12-22 09:59:09,831 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2037 transitions. Word has length 66 [2020-12-22 09:59:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:09,832 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 2037 transitions. [2020-12-22 09:59:09,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2037 transitions. [2020-12-22 09:59:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:09,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:09,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:09,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:59:09,834 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:59:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:09,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037022878] [2020-12-22 09:59:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:10,068 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 09:59:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037022878] [2020-12-22 09:59:10,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:10,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:10,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067934534] [2020-12-22 09:59:10,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:10,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:10,071 INFO L87 Difference]: Start difference. First operand 1151 states and 2037 transitions. Second operand 7 states. [2020-12-22 09:59:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:10,299 INFO L93 Difference]: Finished difference Result 1513 states and 2599 transitions. [2020-12-22 09:59:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:10,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:59:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:10,307 INFO L225 Difference]: With dead ends: 1513 [2020-12-22 09:59:10,307 INFO L226 Difference]: Without dead ends: 1153 [2020-12-22 09:59:10,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:59:10,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2020-12-22 09:59:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1151. [2020-12-22 09:59:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 09:59:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2033 transitions. [2020-12-22 09:59:10,347 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2033 transitions. Word has length 66 [2020-12-22 09:59:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:10,347 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 2033 transitions. [2020-12-22 09:59:10,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2033 transitions. [2020-12-22 09:59:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:10,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:10,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:10,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:59:10,349 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:10,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:59:10,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:10,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336183979] [2020-12-22 09:59:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:10,411 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 09:59:10,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336183979] [2020-12-22 09:59:10,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:10,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412467119] [2020-12-22 09:59:10,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:10,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:10,414 INFO L87 Difference]: Start difference. First operand 1151 states and 2033 transitions. Second operand 3 states. [2020-12-22 09:59:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:10,475 INFO L93 Difference]: Finished difference Result 1823 states and 3067 transitions. [2020-12-22 09:59:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:10,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:10,484 INFO L225 Difference]: With dead ends: 1823 [2020-12-22 09:59:10,485 INFO L226 Difference]: Without dead ends: 1463 [2020-12-22 09:59:10,486 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 09:59:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-12-22 09:59:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1461. [2020-12-22 09:59:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2020-12-22 09:59:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2501 transitions. [2020-12-22 09:59:10,549 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2501 transitions. Word has length 66 [2020-12-22 09:59:10,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:10,551 INFO L481 AbstractCegarLoop]: Abstraction has 1461 states and 2501 transitions. [2020-12-22 09:59:10,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2501 transitions. [2020-12-22 09:59:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:10,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:10,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:10,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:59:10,552 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:59:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:10,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108498702] [2020-12-22 09:59:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:10,624 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 09:59:10,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108498702] [2020-12-22 09:59:10,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:10,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:10,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183872193] [2020-12-22 09:59:10,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:10,628 INFO L87 Difference]: Start difference. First operand 1461 states and 2501 transitions. Second operand 3 states. [2020-12-22 09:59:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:10,717 INFO L93 Difference]: Finished difference Result 2705 states and 4391 transitions. [2020-12-22 09:59:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:10,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:10,729 INFO L225 Difference]: With dead ends: 2705 [2020-12-22 09:59:10,729 INFO L226 Difference]: Without dead ends: 2035 [2020-12-22 09:59:10,731 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 09:59:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2020-12-22 09:59:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2033. [2020-12-22 09:59:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2033 states. [2020-12-22 09:59:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3349 transitions. [2020-12-22 09:59:10,820 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3349 transitions. Word has length 66 [2020-12-22 09:59:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:10,820 INFO L481 AbstractCegarLoop]: Abstraction has 2033 states and 3349 transitions. [2020-12-22 09:59:10,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3349 transitions. [2020-12-22 09:59:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:59:10,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:10,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:10,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:59:10,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:59:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:10,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480340289] [2020-12-22 09:59:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:10,893 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 09:59:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480340289] [2020-12-22 09:59:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462678821] [2020-12-22 09:59:10,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:10,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:10,899 INFO L87 Difference]: Start difference. First operand 2033 states and 3349 transitions. Second operand 3 states. [2020-12-22 09:59:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:11,113 INFO L93 Difference]: Finished difference Result 4325 states and 6775 transitions. [2020-12-22 09:59:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:11,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:59:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:11,131 INFO L225 Difference]: With dead ends: 4325 [2020-12-22 09:59:11,131 INFO L226 Difference]: Without dead ends: 3083 [2020-12-22 09:59:11,136 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 09:59:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2020-12-22 09:59:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 3081. [2020-12-22 09:59:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3081 states. [2020-12-22 09:59:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4869 transitions. [2020-12-22 09:59:11,286 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4869 transitions. Word has length 66 [2020-12-22 09:59:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:11,291 INFO L481 AbstractCegarLoop]: Abstraction has 3081 states and 4869 transitions. [2020-12-22 09:59:11,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4869 transitions. [2020-12-22 09:59:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:11,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:11,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:59:11,297 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:59:11,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:11,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901180887] [2020-12-22 09:59:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:11,406 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 09:59:11,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901180887] [2020-12-22 09:59:11,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:11,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:59:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403446450] [2020-12-22 09:59:11,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:59:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:59:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:11,411 INFO L87 Difference]: Start difference. First operand 3081 states and 4869 transitions. Second operand 5 states. [2020-12-22 09:59:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:11,685 INFO L93 Difference]: Finished difference Result 4807 states and 7371 transitions. [2020-12-22 09:59:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:11,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:59:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:11,714 INFO L225 Difference]: With dead ends: 4807 [2020-12-22 09:59:11,715 INFO L226 Difference]: Without dead ends: 4805 [2020-12-22 09:59:11,718 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 09:59:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4805 states. [2020-12-22 09:59:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4805 to 3177. [2020-12-22 09:59:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3177 states. [2020-12-22 09:59:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4949 transitions. [2020-12-22 09:59:11,917 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4949 transitions. Word has length 67 [2020-12-22 09:59:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:11,917 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 4949 transitions. [2020-12-22 09:59:11,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:59:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4949 transitions. [2020-12-22 09:59:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:59:11,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:11,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:11,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:59:11,919 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1015383421, now seen corresponding path program 1 times [2020-12-22 09:59:11,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:11,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245556015] [2020-12-22 09:59:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:12,059 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 09:59:12,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245556015] [2020-12-22 09:59:12,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:12,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:12,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865749252] [2020-12-22 09:59:12,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:59:12,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:59:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:59:12,064 INFO L87 Difference]: Start difference. First operand 3177 states and 4949 transitions. Second operand 4 states. [2020-12-22 09:59:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:23,697 INFO L93 Difference]: Finished difference Result 5432 states and 9258 transitions. [2020-12-22 09:59:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:59:23,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 09:59:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:23,720 INFO L225 Difference]: With dead ends: 5432 [2020-12-22 09:59:23,721 INFO L226 Difference]: Without dead ends: 4679 [2020-12-22 09:59:23,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:59:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2020-12-22 09:59:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4679. [2020-12-22 09:59:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4679 states. [2020-12-22 09:59:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 7063 transitions. [2020-12-22 09:59:24,004 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 7063 transitions. Word has length 67 [2020-12-22 09:59:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:24,004 INFO L481 AbstractCegarLoop]: Abstraction has 4679 states and 7063 transitions. [2020-12-22 09:59:24,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:59:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 7063 transitions. [2020-12-22 09:59:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:59:24,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:24,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:24,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:59:24,006 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:59:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:24,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106771369] [2020-12-22 09:59:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:24,073 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 09:59:24,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106771369] [2020-12-22 09:59:24,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:24,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:24,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694328554] [2020-12-22 09:59:24,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:24,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:24,076 INFO L87 Difference]: Start difference. First operand 4679 states and 7063 transitions. Second operand 3 states. [2020-12-22 09:59:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:24,330 INFO L93 Difference]: Finished difference Result 7118 states and 10653 transitions. [2020-12-22 09:59:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:24,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:59:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:24,364 INFO L225 Difference]: With dead ends: 7118 [2020-12-22 09:59:24,365 INFO L226 Difference]: Without dead ends: 5771 [2020-12-22 09:59:24,369 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 09:59:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2020-12-22 09:59:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5769. [2020-12-22 09:59:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5769 states. [2020-12-22 09:59:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 8617 transitions. [2020-12-22 09:59:24,699 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 8617 transitions. Word has length 68 [2020-12-22 09:59:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:24,699 INFO L481 AbstractCegarLoop]: Abstraction has 5769 states and 8617 transitions. [2020-12-22 09:59:24,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 8617 transitions. [2020-12-22 09:59:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:24,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:24,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:24,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:59:24,704 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:59:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:24,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029577675] [2020-12-22 09:59:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:59:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029577675] [2020-12-22 09:59:24,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980113871] [2020-12-22 09:59:24,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:24,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:24,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:24,847 INFO L87 Difference]: Start difference. First operand 5769 states and 8617 transitions. Second operand 7 states. [2020-12-22 09:59:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:26,130 INFO L93 Difference]: Finished difference Result 23845 states and 34719 transitions. [2020-12-22 09:59:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:26,130 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:26,178 INFO L225 Difference]: With dead ends: 23845 [2020-12-22 09:59:26,178 INFO L226 Difference]: Without dead ends: 20371 [2020-12-22 09:59:26,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20371 states. [2020-12-22 09:59:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20371 to 9241. [2020-12-22 09:59:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9241 states. [2020-12-22 09:59:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13593 transitions. [2020-12-22 09:59:26,803 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13593 transitions. Word has length 94 [2020-12-22 09:59:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:26,803 INFO L481 AbstractCegarLoop]: Abstraction has 9241 states and 13593 transitions. [2020-12-22 09:59:26,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13593 transitions. [2020-12-22 09:59:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:26,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:26,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:26,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:59:26,810 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:59:26,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:26,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239243066] [2020-12-22 09:59:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:59:26,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239243066] [2020-12-22 09:59:26,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:26,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:26,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593005453] [2020-12-22 09:59:26,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:26,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:26,943 INFO L87 Difference]: Start difference. First operand 9241 states and 13593 transitions. Second operand 7 states. [2020-12-22 09:59:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:28,410 INFO L93 Difference]: Finished difference Result 27317 states and 39695 transitions. [2020-12-22 09:59:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:28,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:28,463 INFO L225 Difference]: With dead ends: 27317 [2020-12-22 09:59:28,463 INFO L226 Difference]: Without dead ends: 23843 [2020-12-22 09:59:28,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23843 states. [2020-12-22 09:59:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23843 to 14457. [2020-12-22 09:59:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14457 states. [2020-12-22 09:59:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14457 states to 14457 states and 21017 transitions. [2020-12-22 09:59:29,432 INFO L78 Accepts]: Start accepts. Automaton has 14457 states and 21017 transitions. Word has length 94 [2020-12-22 09:59:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 14457 states and 21017 transitions. [2020-12-22 09:59:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 14457 states and 21017 transitions. [2020-12-22 09:59:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:29,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:29,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:29,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:59:29,438 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:59:29,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:29,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934744171] [2020-12-22 09:59:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:59:29,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934744171] [2020-12-22 09:59:29,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:29,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:29,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255778025] [2020-12-22 09:59:29,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:29,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:29,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:29,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:29,557 INFO L87 Difference]: Start difference. First operand 14457 states and 21017 transitions. Second operand 7 states. [2020-12-22 09:59:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:31,030 INFO L93 Difference]: Finished difference Result 30789 states and 44671 transitions. [2020-12-22 09:59:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:31,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:31,087 INFO L225 Difference]: With dead ends: 30789 [2020-12-22 09:59:31,087 INFO L226 Difference]: Without dead ends: 27315 [2020-12-22 09:59:31,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27315 states. [2020-12-22 09:59:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27315 to 17929. [2020-12-22 09:59:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17929 states. [2020-12-22 09:59:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17929 states to 17929 states and 25993 transitions. [2020-12-22 09:59:32,241 INFO L78 Accepts]: Start accepts. Automaton has 17929 states and 25993 transitions. Word has length 94 [2020-12-22 09:59:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 17929 states and 25993 transitions. [2020-12-22 09:59:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17929 states and 25993 transitions. [2020-12-22 09:59:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:59:32,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:32,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:32,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:59:32,247 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:32,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:32,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:59:32,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:32,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540827503] [2020-12-22 09:59:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:59:32,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540827503] [2020-12-22 09:59:32,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:32,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735258109] [2020-12-22 09:59:32,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:32,365 INFO L87 Difference]: Start difference. First operand 17929 states and 25993 transitions. Second operand 7 states. [2020-12-22 09:59:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:33,997 INFO L93 Difference]: Finished difference Result 34261 states and 49647 transitions. [2020-12-22 09:59:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:33,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:59:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:34,054 INFO L225 Difference]: With dead ends: 34261 [2020-12-22 09:59:34,054 INFO L226 Difference]: Without dead ends: 30787 [2020-12-22 09:59:34,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30787 states. [2020-12-22 09:59:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30787 to 21401. [2020-12-22 09:59:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21401 states. [2020-12-22 09:59:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21401 states to 21401 states and 30969 transitions. [2020-12-22 09:59:35,355 INFO L78 Accepts]: Start accepts. Automaton has 21401 states and 30969 transitions. Word has length 94 [2020-12-22 09:59:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:35,355 INFO L481 AbstractCegarLoop]: Abstraction has 21401 states and 30969 transitions. [2020-12-22 09:59:35,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21401 states and 30969 transitions. [2020-12-22 09:59:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:59:35,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:35,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:35,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:59:35,362 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:59:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:35,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562212359] [2020-12-22 09:59:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:35,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562212359] [2020-12-22 09:59:35,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:35,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186548042] [2020-12-22 09:59:35,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:35,432 INFO L87 Difference]: Start difference. First operand 21401 states and 30969 transitions. Second operand 3 states. [2020-12-22 09:59:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:36,326 INFO L93 Difference]: Finished difference Result 34810 states and 50366 transitions. [2020-12-22 09:59:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:36,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:59:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:36,350 INFO L225 Difference]: With dead ends: 34810 [2020-12-22 09:59:36,351 INFO L226 Difference]: Without dead ends: 15704 [2020-12-22 09:59:36,375 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 09:59:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15704 states. [2020-12-22 09:59:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15704 to 15702. [2020-12-22 09:59:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15702 states. [2020-12-22 09:59:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15702 states to 15702 states and 22811 transitions. [2020-12-22 09:59:37,330 INFO L78 Accepts]: Start accepts. Automaton has 15702 states and 22811 transitions. Word has length 96 [2020-12-22 09:59:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:37,331 INFO L481 AbstractCegarLoop]: Abstraction has 15702 states and 22811 transitions. [2020-12-22 09:59:37,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15702 states and 22811 transitions. [2020-12-22 09:59:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:59:37,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:37,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:37,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:59:37,335 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:59:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:37,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480047577] [2020-12-22 09:59:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:37,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480047577] [2020-12-22 09:59:37,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:37,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:59:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416041057] [2020-12-22 09:59:37,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:59:37,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:59:37,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:59:37,454 INFO L87 Difference]: Start difference. First operand 15702 states and 22811 transitions. Second operand 7 states. [2020-12-22 09:59:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:39,103 INFO L93 Difference]: Finished difference Result 27874 states and 40417 transitions. [2020-12-22 09:59:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:59:39,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:59:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:39,133 INFO L225 Difference]: With dead ends: 27874 [2020-12-22 09:59:39,134 INFO L226 Difference]: Without dead ends: 25440 [2020-12-22 09:59:39,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:59:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25440 states. [2020-12-22 09:59:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25440 to 18134. [2020-12-22 09:59:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18134 states. [2020-12-22 09:59:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26299 transitions. [2020-12-22 09:59:40,415 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26299 transitions. Word has length 96 [2020-12-22 09:59:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:40,416 INFO L481 AbstractCegarLoop]: Abstraction has 18134 states and 26299 transitions. [2020-12-22 09:59:40,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:59:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26299 transitions. [2020-12-22 09:59:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:40,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:40,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:40,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:59:40,421 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:59:40,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:40,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003872204] [2020-12-22 09:59:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003872204] [2020-12-22 09:59:40,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:40,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:40,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667628508] [2020-12-22 09:59:40,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:40,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:40,501 INFO L87 Difference]: Start difference. First operand 18134 states and 26299 transitions. Second operand 3 states. [2020-12-22 09:59:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:41,013 INFO L93 Difference]: Finished difference Result 26042 states and 37637 transitions. [2020-12-22 09:59:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:41,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:41,025 INFO L225 Difference]: With dead ends: 26042 [2020-12-22 09:59:41,026 INFO L226 Difference]: Without dead ends: 10232 [2020-12-22 09:59:41,044 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 09:59:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-12-22 09:59:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 10230. [2020-12-22 09:59:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10230 states. [2020-12-22 09:59:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 14859 transitions. [2020-12-22 09:59:41,728 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 14859 transitions. Word has length 97 [2020-12-22 09:59:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:41,728 INFO L481 AbstractCegarLoop]: Abstraction has 10230 states and 14859 transitions. [2020-12-22 09:59:41,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 14859 transitions. [2020-12-22 09:59:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:41,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:41,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:41,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:59:41,732 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:41,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:59:41,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:41,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157509750] [2020-12-22 09:59:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:41,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157509750] [2020-12-22 09:59:41,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:41,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309499357] [2020-12-22 09:59:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:41,795 INFO L87 Difference]: Start difference. First operand 10230 states and 14859 transitions. Second operand 3 states. [2020-12-22 09:59:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:42,088 INFO L93 Difference]: Finished difference Result 14186 states and 20477 transitions. [2020-12-22 09:59:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:42,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:42,096 INFO L225 Difference]: With dead ends: 14186 [2020-12-22 09:59:42,097 INFO L226 Difference]: Without dead ends: 6280 [2020-12-22 09:59:42,106 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 09:59:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2020-12-22 09:59:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6278. [2020-12-22 09:59:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6278 states. [2020-12-22 09:59:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 9191 transitions. [2020-12-22 09:59:42,359 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 9191 transitions. Word has length 97 [2020-12-22 09:59:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:42,359 INFO L481 AbstractCegarLoop]: Abstraction has 6278 states and 9191 transitions. [2020-12-22 09:59:42,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 9191 transitions. [2020-12-22 09:59:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:42,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:42,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:42,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:59:42,362 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:42,362 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:59:42,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:42,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667677310] [2020-12-22 09:59:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667677310] [2020-12-22 09:59:42,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:42,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:42,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306357174] [2020-12-22 09:59:42,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:42,431 INFO L87 Difference]: Start difference. First operand 6278 states and 9191 transitions. Second operand 3 states. [2020-12-22 09:59:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:42,676 INFO L93 Difference]: Finished difference Result 8258 states and 11975 transitions. [2020-12-22 09:59:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:59:42,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:59:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:42,684 INFO L225 Difference]: With dead ends: 8258 [2020-12-22 09:59:42,685 INFO L226 Difference]: Without dead ends: 4304 [2020-12-22 09:59:42,690 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 09:59:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2020-12-22 09:59:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4302. [2020-12-22 09:59:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2020-12-22 09:59:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 6383 transitions. [2020-12-22 09:59:42,985 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 6383 transitions. Word has length 97 [2020-12-22 09:59:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:42,986 INFO L481 AbstractCegarLoop]: Abstraction has 4302 states and 6383 transitions. [2020-12-22 09:59:42,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:59:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 6383 transitions. [2020-12-22 09:59:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:42,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:42,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:42,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:59:42,989 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:59:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:42,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833417532] [2020-12-22 09:59:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833417532] [2020-12-22 09:59:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520809656] [2020-12-22 09:59:43,452 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 09:59:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:59:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:59:44,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:44,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:59:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042150551] [2020-12-22 09:59:44,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:59:44,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:59:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:59:44,126 INFO L87 Difference]: Start difference. First operand 4302 states and 6383 transitions. Second operand 16 states. [2020-12-22 09:59:46,223 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 09:59:46,414 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-22 09:59:48,121 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:59:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:48,523 INFO L93 Difference]: Finished difference Result 15373 states and 21402 transitions. [2020-12-22 09:59:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:59:48,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:59:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:48,577 INFO L225 Difference]: With dead ends: 15373 [2020-12-22 09:59:48,577 INFO L226 Difference]: Without dead ends: 13395 [2020-12-22 09:59:48,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:59:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13395 states. [2020-12-22 09:59:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13395 to 10024. [2020-12-22 09:59:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10024 states. [2020-12-22 09:59:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 13945 transitions. [2020-12-22 09:59:49,379 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 13945 transitions. Word has length 97 [2020-12-22 09:59:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:49,380 INFO L481 AbstractCegarLoop]: Abstraction has 10024 states and 13945 transitions. [2020-12-22 09:59:49,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:59:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 13945 transitions. [2020-12-22 09:59:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:49,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:49,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:49,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:59:49,598 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:59:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:49,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751504669] [2020-12-22 09:59:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:49,957 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:59:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:50,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751504669] [2020-12-22 09:59:50,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493514138] [2020-12-22 09:59:50,084 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 09:59:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:59:50,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:50,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:59:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:50,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:50,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:59:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377757367] [2020-12-22 09:59:50,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:59:50,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:59:50,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:59:50,957 INFO L87 Difference]: Start difference. First operand 10024 states and 13945 transitions. Second operand 22 states. [2020-12-22 09:59:53,563 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:59:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:59:56,502 INFO L93 Difference]: Finished difference Result 40825 states and 55011 transitions. [2020-12-22 09:59:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:59:56,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:59:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:59:56,548 INFO L225 Difference]: With dead ends: 40825 [2020-12-22 09:59:56,548 INFO L226 Difference]: Without dead ends: 34322 [2020-12-22 09:59:56,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:59:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34322 states. [2020-12-22 09:59:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34322 to 22527. [2020-12-22 09:59:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22527 states. [2020-12-22 09:59:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22527 states to 22527 states and 30484 transitions. [2020-12-22 09:59:58,702 INFO L78 Accepts]: Start accepts. Automaton has 22527 states and 30484 transitions. Word has length 98 [2020-12-22 09:59:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:58,702 INFO L481 AbstractCegarLoop]: Abstraction has 22527 states and 30484 transitions. [2020-12-22 09:59:58,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:59:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 22527 states and 30484 transitions. [2020-12-22 09:59:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:59:58,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:58,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:58,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:59:58,919 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:59:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:58,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988271845] [2020-12-22 09:59:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:59,178 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 09:59:59,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988271845] [2020-12-22 09:59:59,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622322627] [2020-12-22 09:59:59,179 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 09:59:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:59,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:59:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:59:59,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:59:59,883 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 09:59:59,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:59:59,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:59:59,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439400945] [2020-12-22 09:59:59,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:59:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:59,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:59:59,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:59:59,886 INFO L87 Difference]: Start difference. First operand 22527 states and 30484 transitions. Second operand 17 states. [2020-12-22 10:00:00,760 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 10:00:02,796 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 10:00:03,291 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 10:00:04,053 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 10:00:08,960 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 10:00:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:27,500 INFO L93 Difference]: Finished difference Result 217082 states and 288294 transitions. [2020-12-22 10:00:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 10:00:27,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 10:00:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:27,907 INFO L225 Difference]: With dead ends: 217082 [2020-12-22 10:00:27,909 INFO L226 Difference]: Without dead ends: 197525 [2020-12-22 10:00:28,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 10:00:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197525 states. [2020-12-22 10:00:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197525 to 112800. [2020-12-22 10:00:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112800 states. [2020-12-22 10:00:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112800 states to 112800 states and 147867 transitions. [2020-12-22 10:00:40,807 INFO L78 Accepts]: Start accepts. Automaton has 112800 states and 147867 transitions. Word has length 98 [2020-12-22 10:00:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:00:40,807 INFO L481 AbstractCegarLoop]: Abstraction has 112800 states and 147867 transitions. [2020-12-22 10:00:40,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:00:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 112800 states and 147867 transitions. [2020-12-22 10:00:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:00:40,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:00:40,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:00:41,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:00:41,025 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:00:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:00:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 10:00:41,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:00:41,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985081996] [2020-12-22 10:00:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:00:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:00:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:00:41,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985081996] [2020-12-22 10:00:41,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:00:41,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:00:41,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516643664] [2020-12-22 10:00:41,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:00:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:00:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:00:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:00:41,410 INFO L87 Difference]: Start difference. First operand 112800 states and 147867 transitions. Second operand 6 states. [2020-12-22 10:00:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:00:52,169 INFO L93 Difference]: Finished difference Result 213245 states and 279648 transitions. [2020-12-22 10:00:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:00:52,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:00:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:00:52,513 INFO L225 Difference]: With dead ends: 213245 [2020-12-22 10:00:52,513 INFO L226 Difference]: Without dead ends: 102941 [2020-12-22 10:00:52,618 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 10:00:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102941 states. [2020-12-22 10:01:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102941 to 102941. [2020-12-22 10:01:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102941 states. [2020-12-22 10:01:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102941 states to 102941 states and 134106 transitions. [2020-12-22 10:01:03,435 INFO L78 Accepts]: Start accepts. Automaton has 102941 states and 134106 transitions. Word has length 98 [2020-12-22 10:01:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:03,435 INFO L481 AbstractCegarLoop]: Abstraction has 102941 states and 134106 transitions. [2020-12-22 10:01:03,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 102941 states and 134106 transitions. [2020-12-22 10:01:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:01:03,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:03,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:03,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 10:01:03,440 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 10:01:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:03,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419052327] [2020-12-22 10:01:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 10:01:03,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419052327] [2020-12-22 10:01:03,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:03,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:01:03,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408667511] [2020-12-22 10:01:03,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:01:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:01:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:01:03,797 INFO L87 Difference]: Start difference. First operand 102941 states and 134106 transitions. Second operand 6 states. [2020-12-22 10:01:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:12,056 INFO L93 Difference]: Finished difference Result 176479 states and 229557 transitions. [2020-12-22 10:01:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:01:12,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:01:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:12,156 INFO L225 Difference]: With dead ends: 176479 [2020-12-22 10:01:12,156 INFO L226 Difference]: Without dead ends: 76200 [2020-12-22 10:01:12,212 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 10:01:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76200 states. [2020-12-22 10:01:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76200 to 76200. [2020-12-22 10:01:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76200 states. [2020-12-22 10:01:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76200 states to 76200 states and 98034 transitions. [2020-12-22 10:01:20,534 INFO L78 Accepts]: Start accepts. Automaton has 76200 states and 98034 transitions. Word has length 98 [2020-12-22 10:01:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:20,535 INFO L481 AbstractCegarLoop]: Abstraction has 76200 states and 98034 transitions. [2020-12-22 10:01:20,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 76200 states and 98034 transitions. [2020-12-22 10:01:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 10:01:20,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:20,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:20,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:01:20,538 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 10:01:20,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:20,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724078790] [2020-12-22 10:01:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:20,625 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 10:01:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724078790] [2020-12-22 10:01:20,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:20,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:01:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767759746] [2020-12-22 10:01:20,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:01:20,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:20,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:01:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:01:20,627 INFO L87 Difference]: Start difference. First operand 76200 states and 98034 transitions. Second operand 6 states. [2020-12-22 10:01:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:27,328 INFO L93 Difference]: Finished difference Result 131990 states and 169698 transitions. [2020-12-22 10:01:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:01:27,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 10:01:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:27,398 INFO L225 Difference]: With dead ends: 131990 [2020-12-22 10:01:27,398 INFO L226 Difference]: Without dead ends: 58170 [2020-12-22 10:01:27,432 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 10:01:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58170 states. [2020-12-22 10:01:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58170 to 58170. [2020-12-22 10:01:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-12-22 10:01:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 74728 transitions. [2020-12-22 10:01:34,002 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 74728 transitions. Word has length 98 [2020-12-22 10:01:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:34,002 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 74728 transitions. [2020-12-22 10:01:34,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 74728 transitions. [2020-12-22 10:01:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 10:01:34,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:34,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:34,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:01:34,006 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 10:01:34,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:34,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743157741] [2020-12-22 10:01:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:34,093 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 10:01:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743157741] [2020-12-22 10:01:34,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:01:34,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:01:34,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062876535] [2020-12-22 10:01:34,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:01:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:01:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:01:34,095 INFO L87 Difference]: Start difference. First operand 58170 states and 74728 transitions. Second operand 6 states. [2020-12-22 10:01:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:01:39,541 INFO L93 Difference]: Finished difference Result 101224 states and 129631 transitions. [2020-12-22 10:01:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:01:39,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 10:01:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:01:39,601 INFO L225 Difference]: With dead ends: 101224 [2020-12-22 10:01:39,602 INFO L226 Difference]: Without dead ends: 45436 [2020-12-22 10:01:39,636 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 10:01:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45436 states. [2020-12-22 10:01:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45436 to 45436. [2020-12-22 10:01:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45436 states. [2020-12-22 10:01:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45436 states to 45436 states and 57971 transitions. [2020-12-22 10:01:45,067 INFO L78 Accepts]: Start accepts. Automaton has 45436 states and 57971 transitions. Word has length 99 [2020-12-22 10:01:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:01:45,067 INFO L481 AbstractCegarLoop]: Abstraction has 45436 states and 57971 transitions. [2020-12-22 10:01:45,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:01:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 45436 states and 57971 transitions. [2020-12-22 10:01:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 10:01:45,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:01:45,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:01:45,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 10:01:45,071 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:01:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:01:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 10:01:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:01:45,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896388424] [2020-12-22 10:01:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:01:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:45,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896388424] [2020-12-22 10:01:45,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885348105] [2020-12-22 10:01:45,338 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 10:01:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:01:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:01:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:01:45,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:01:46,027 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 10:01:46,583 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-22 10:01:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:01:46,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:01:46,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 10:01:46,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281987745] [2020-12-22 10:01:46,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:01:46,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:01:46,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:01:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:01:46,730 INFO L87 Difference]: Start difference. First operand 45436 states and 57971 transitions. Second operand 20 states. [2020-12-22 10:01:47,673 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 10:01:48,169 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 10:01:48,864 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 10:01:49,580 WARN L197 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 10:01:50,134 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:01:50,816 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:01:51,656 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:01:52,312 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 10:01:53,030 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:01:53,628 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 10:01:54,342 WARN L197 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:01:54,991 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:01:55,858 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 10:01:56,548 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 10:01:57,224 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 10:01:58,212 WARN L197 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 10:02:01,667 WARN L197 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:02:02,589 WARN L197 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 10:02:03,494 WARN L197 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:02:03,971 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:02:04,978 WARN L197 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 10:02:05,408 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:02:05,892 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:02:06,340 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:02:06,948 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 10:02:07,325 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:02:08,361 WARN L197 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 10:02:09,197 WARN L197 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:02:09,664 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 10:02:10,068 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:02:11,252 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:02:11,643 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 10:02:12,478 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 10:02:12,881 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 10:02:13,274 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 10:02:16,731 WARN L197 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 10:02:18,139 WARN L197 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 10:02:19,076 WARN L197 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 10:02:19,540 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:02:20,037 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 10:02:20,857 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 10:02:21,356 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 10:02:21,907 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:02:22,203 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 10:02:22,802 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:02:23,084 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:02:33,824 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:02:34,104 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 10:02:34,977 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:02:35,255 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 10:02:37,458 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 10:02:38,153 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 10:02:44,631 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 10:02:45,261 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 101