/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:43:10,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:43:10,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:43:10,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:43:10,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:43:10,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:43:10,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:43:10,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:43:10,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:43:10,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:43:10,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:43:10,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:43:10,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:43:10,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:43:10,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:43:10,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:43:10,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:43:10,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:43:10,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:43:10,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:43:10,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:43:10,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:43:10,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:43:10,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:43:10,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:43:10,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:43:10,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:43:10,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:43:10,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:43:10,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:43:10,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:43:10,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:43:10,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:43:10,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:43:10,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:43:10,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:43:10,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:43:10,667 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:43:10,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:43:10,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:43:10,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:43:10,672 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:43:10,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:43:10,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:43:10,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:43:10,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:43:10,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:43:10,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:43:10,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:43:10,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:43:10,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:43:10,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:43:10,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:43:10,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:43:10,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:43:10,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:43:10,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:43:10,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:43:10,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:43:10,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:43:10,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:43:10,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:43:10,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:43:11,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:43:11,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:43:11,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:43:11,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:43:11,076 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:43:11,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:43:11,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c0f9674/ed870d670b2f4c8c8e85333464e1f71a/FLAG2cc42edb7 [2020-12-22 09:43:12,111 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:43:12,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:43:12,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c0f9674/ed870d670b2f4c8c8e85333464e1f71a/FLAG2cc42edb7 [2020-12-22 09:43:12,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c0f9674/ed870d670b2f4c8c8e85333464e1f71a [2020-12-22 09:43:12,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:43:12,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:43:12,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:43:12,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:43:12,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:43:12,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:43:12" (1/1) ... [2020-12-22 09:43:12,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de06a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:12, skipping insertion in model container [2020-12-22 09:43:12,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:43:12" (1/1) ... [2020-12-22 09:43:12,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:43:12,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:43:13,117 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[8821,8834] [2020-12-22 09:43:13,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15639,15652] [2020-12-22 09:43:14,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:43:14,217 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:43:14,286 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[8821,8834] [2020-12-22 09:43:14,304 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15639,15652] [2020-12-22 09:43:14,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:43:14,933 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:43:14,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14 WrapperNode [2020-12-22 09:43:14,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:43:14,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:43:14,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:43:14,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:43:14,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:15,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:15,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:43:15,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:43:15,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:43:15,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:43:15,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:15,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:15,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:15,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:16,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:16,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:16,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (1/1) ... [2020-12-22 09:43:16,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:43:16,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:43:16,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:43:16,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:43:16,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (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 09:43:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:43:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:43:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:43:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:43:21,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:43:21,585 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:43:21,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:43:21 BoogieIcfgContainer [2020-12-22 09:43:21,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:43:21,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:43:21,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:43:21,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:43:21,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:43:12" (1/3) ... [2020-12-22 09:43:21,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8a9b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:43:21, skipping insertion in model container [2020-12-22 09:43:21,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:43:14" (2/3) ... [2020-12-22 09:43:21,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8a9b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:43:21, skipping insertion in model container [2020-12-22 09:43:21,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:43:21" (3/3) ... [2020-12-22 09:43:21,598 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:43:21,605 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:43:21,611 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:43:21,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:43:21,666 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:43:21,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:43:21,666 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:43:21,667 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:43:21,667 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:43:21,667 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:43:21,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:43:21,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:43:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:43:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:43:21,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:21,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:21,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:43:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:21,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205375504] [2020-12-22 09:43:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:22,027 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 09:43:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205375504] [2020-12-22 09:43:22,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:22,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:43:22,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047996264] [2020-12-22 09:43:22,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:43:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:43:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:43:22,058 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:43:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:22,157 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:43:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:43:22,159 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:43:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:22,202 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:43:22,202 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:43:22,211 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 09:43:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:43:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:43:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:43:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:43:22,321 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:43:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:22,321 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:43:22,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:43:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:43:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:43:22,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:22,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:22,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:43:22,324 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:43:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348864291] [2020-12-22 09:43:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:22,539 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 09:43:22,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348864291] [2020-12-22 09:43:22,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:22,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:22,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075278035] [2020-12-22 09:43:22,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:43:22,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:22,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:43:22,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:43:22,544 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:43:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:22,766 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:43:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:43:22,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:43:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:22,773 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:43:22,773 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:43:22,774 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 09:43:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:43:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:43:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:43:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:43:22,810 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:43:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:22,810 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:43:22,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:43:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:43:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:43:22,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:22,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:22,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:43:22,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:43:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:22,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116689185] [2020-12-22 09:43:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:22,949 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 09:43:22,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116689185] [2020-12-22 09:43:22,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:22,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376114939] [2020-12-22 09:43:22,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:22,953 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:43:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:23,162 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:43:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:43:23,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:43:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:23,170 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:43:23,170 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:43:23,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:43:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:43:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:43:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:43:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:43:23,212 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:43:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:23,213 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:43:23,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:43:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:43:23,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:23,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:23,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:43:23,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:43:23,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:23,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320205252] [2020-12-22 09:43:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:23,385 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 09:43:23,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320205252] [2020-12-22 09:43:23,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:23,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658085493] [2020-12-22 09:43:23,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:23,388 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:43:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:23,441 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:43:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:23,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:43:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:23,448 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:43:23,448 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:43:23,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:43:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:43:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:43:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:43:23,477 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:43:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:23,477 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:43:23,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:43:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:43:23,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:23,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:23,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:43:23,479 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:43:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:23,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139834946] [2020-12-22 09:43:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:23,681 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 09:43:23,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139834946] [2020-12-22 09:43:23,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:23,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302913753] [2020-12-22 09:43:23,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:23,684 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:43:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:23,859 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:43:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:23,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:43:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:23,866 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:43:23,866 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:43:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:43:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:43:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:43:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:43:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:43:23,900 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:43:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:23,900 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:43:23,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:43:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:43:23,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:23,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:23,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:43:23,902 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:43:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:23,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726297468] [2020-12-22 09:43:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:23,964 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 09:43:23,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726297468] [2020-12-22 09:43:23,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:23,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:23,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791136] [2020-12-22 09:43:23,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:23,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:23,967 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:43:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:24,015 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:43:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:24,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:43:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:24,023 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:43:24,023 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:43:24,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:43:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:43:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:43:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:43:24,061 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:43:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:24,062 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:43:24,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:43:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:43:24,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:24,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:24,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:43:24,064 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:43:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:24,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178724637] [2020-12-22 09:43:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:24,114 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 09:43:24,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178724637] [2020-12-22 09:43:24,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:24,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:24,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806042056] [2020-12-22 09:43:24,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:24,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,117 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:43:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:24,172 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:43:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:24,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:43:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:24,181 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:43:24,181 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:43:24,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:43:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:43:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:43:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:43:24,231 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:43:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:24,231 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:43:24,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:43:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:43:24,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:24,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:24,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:43:24,233 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:43:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925548852] [2020-12-22 09:43:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:24,283 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 09:43:24,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925548852] [2020-12-22 09:43:24,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:24,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:24,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928344021] [2020-12-22 09:43:24,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,286 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:43:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:24,351 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:43:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:24,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:43:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:24,362 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:43:24,363 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:43:24,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:43:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:43:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:43:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:43:24,433 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:43:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:24,434 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:43:24,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:43:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:43:24,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:24,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:24,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:43:24,436 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:43:24,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:24,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988221823] [2020-12-22 09:43:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:24,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988221823] [2020-12-22 09:43:24,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:24,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489327870] [2020-12-22 09:43:24,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:43:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:43:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:43:24,618 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:43:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:24,795 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:43:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:43:24,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:43:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:24,811 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:43:24,811 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:43:24,812 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 09:43:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:43:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:43:24,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:43:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:43:24,928 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:43:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:24,928 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:43:24,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:43:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:43:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:43:24,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:24,930 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] [2020-12-22 09:43:24,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:43:24,930 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:43:24,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:24,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175794092] [2020-12-22 09:43:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:25,003 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 09:43:25,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175794092] [2020-12-22 09:43:25,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:25,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:25,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947349066] [2020-12-22 09:43:25,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:25,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:25,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:25,008 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:43:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:25,132 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:43:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:25,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:43:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:25,147 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:43:25,148 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:43:25,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:43:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:43:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:43:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:43:25,294 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:43:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:25,295 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:43:25,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:43:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:43:25,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:25,296 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] [2020-12-22 09:43:25,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:43:25,297 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1815155450, now seen corresponding path program 1 times [2020-12-22 09:43:25,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:25,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244246524] [2020-12-22 09:43:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:25,419 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 09:43:25,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244246524] [2020-12-22 09:43:25,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:25,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:25,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193997118] [2020-12-22 09:43:25,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:43:25,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:43:25,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:43:25,428 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 4 states. [2020-12-22 09:43:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:36,034 INFO L93 Difference]: Finished difference Result 4538 states and 7932 transitions. [2020-12-22 09:43:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:43:36,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:43:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:36,055 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:43:36,055 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:43:36,057 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 09:43:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:43:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:43:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:43:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:43:36,267 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 61 [2020-12-22 09:43:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:43:36,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:43:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:43:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:43:36,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:36,270 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:43:36,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:43:36,270 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:43:36,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:36,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631177223] [2020-12-22 09:43:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:43:36,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631177223] [2020-12-22 09:43:36,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:36,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:36,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880883137] [2020-12-22 09:43:36,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:36,380 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:43:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:36,909 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:43:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:36,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:43:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:36,970 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:43:36,970 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:43:36,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:43:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:43:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:43:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:43:37,315 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:43:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:37,315 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:43:37,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:43:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:43:37,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:37,318 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:43:37,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:43:37,318 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:43:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:37,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479205078] [2020-12-22 09:43:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:43:37,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479205078] [2020-12-22 09:43:37,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:37,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:37,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789610889] [2020-12-22 09:43:37,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:37,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:37,447 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:43:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:38,061 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:43:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:38,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:43:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:38,167 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:43:38,167 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:43:38,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:43:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:43:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:43:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:43:38,731 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:43:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:38,731 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:43:38,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:43:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:43:38,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:38,734 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:43:38,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:43:38,735 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:43:38,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:38,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540018037] [2020-12-22 09:43:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:43:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540018037] [2020-12-22 09:43:38,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:38,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262668972] [2020-12-22 09:43:38,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:38,856 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:43:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:39,588 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:43:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:39,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:43:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:39,613 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:43:39,613 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:43:39,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:43:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:43:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:43:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:43:40,159 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:43:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:40,159 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:43:40,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:43:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:43:40,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:40,163 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] [2020-12-22 09:43:40,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:43:40,163 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:43:40,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:40,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112538643] [2020-12-22 09:43:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:40,236 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 09:43:40,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112538643] [2020-12-22 09:43:40,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:40,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:40,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146798240] [2020-12-22 09:43:40,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:40,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:40,240 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:43:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:40,654 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:43:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:40,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:43:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:40,669 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:43:40,670 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:43:40,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:43:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:43:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:43:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:43:41,043 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:43:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:41,044 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:43:41,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:43:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:43:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:41,046 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:43:41,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:43:41,047 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:43:41,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:41,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560946205] [2020-12-22 09:43:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:43:41,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560946205] [2020-12-22 09:43:41,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:41,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:43:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125092754] [2020-12-22 09:43:41,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:41,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:41,138 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:43:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:41,758 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:43:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:41,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:43:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:41,782 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:43:41,782 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:43:41,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:43:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:43:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:43:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:43:42,281 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:43:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:42,281 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:43:42,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:43:42,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:42,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:42,285 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] [2020-12-22 09:43:42,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:43:42,285 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:43:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:42,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418061599] [2020-12-22 09:43:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:42,347 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 09:43:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418061599] [2020-12-22 09:43:42,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:42,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:42,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181421523] [2020-12-22 09:43:42,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:42,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:42,350 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:43:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:42,578 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:43:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:42,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:42,589 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:43:42,590 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:43:42,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:43:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:43:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:43:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:43:42,841 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:43:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:42,841 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:43:42,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:43:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:42,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:42,844 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:43:42,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:43:42,844 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:43:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37032875] [2020-12-22 09:43:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:42,902 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 09:43:42,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37032875] [2020-12-22 09:43:42,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:42,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:42,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477316167] [2020-12-22 09:43:42,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:42,904 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:43:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:43,042 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:43:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:43,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:43,049 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:43:43,050 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:43:43,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:43:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:43:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:43:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:43:43,206 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:43:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:43,207 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:43:43,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:43,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:43:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:43,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:43,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:43,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:43:43,209 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:43:43,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:43,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934962169] [2020-12-22 09:43:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:43,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934962169] [2020-12-22 09:43:43,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:43,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:43:43,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667195148] [2020-12-22 09:43:43,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:43:43,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:43:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:43,278 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:43:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:43,356 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:43:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:43:43,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:43:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:43,364 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:43:43,364 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:43:43,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:43:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:43:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:43:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:43:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:43:43,456 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:43:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:43,457 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:43:43,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:43:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:43:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:43:43,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:43,459 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] [2020-12-22 09:43:43,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:43:43,459 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:43,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:43:43,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:43,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907577916] [2020-12-22 09:43:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:43,712 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 09:43:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907577916] [2020-12-22 09:43:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325818829] [2020-12-22 09:43:43,713 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 09:43:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:43:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:43:44,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:44,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:43:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177767545] [2020-12-22 09:43:44,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:43:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:43:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:43:44,196 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:43:44,497 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-22 09:43:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:45,863 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:43:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:43:45,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:43:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:45,878 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:43:45,878 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:43:45,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:43:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:43:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:43:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:43:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:43:46,222 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:43:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:46,222 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:43:46,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:43:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:43:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:46,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:46,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:46,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:46,439 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:46,439 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:43:46,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:46,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115516636] [2020-12-22 09:43:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:46,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115516636] [2020-12-22 09:43:46,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370079938] [2020-12-22 09:43:46,664 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 09:43:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:46,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:43:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:46,937 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:43:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:47,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:47,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:43:47,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240483800] [2020-12-22 09:43:47,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:43:47,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:43:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:43:47,311 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:43:50,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:50,343 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:43:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:43:50,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:43:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:50,370 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:43:50,370 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:43:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:43:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:43:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:43:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:43:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:43:51,163 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:43:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:51,163 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:43:51,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:43:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:43:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:51,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:51,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:51,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:51,374 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:43:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923337296] [2020-12-22 09:43:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:51,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923337296] [2020-12-22 09:43:51,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386268163] [2020-12-22 09:43:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:43:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:43:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:43:51,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:43:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:43:52,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:43:52,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:43:52,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36371033] [2020-12-22 09:43:52,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:43:52,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:43:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:43:52,166 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:43:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:55,881 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:43:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:43:55,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:43:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:55,922 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:43:55,922 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:43:55,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:43:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:43:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:43:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:43:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:43:57,671 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:43:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:57,671 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:43:57,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:43:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:43:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:57,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:57,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:57,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:43:57,875 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:43:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:57,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528801054] [2020-12-22 09:43:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:43:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:43:57,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528801054] [2020-12-22 09:43:57,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:43:57,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:43:57,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199527894] [2020-12-22 09:43:57,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:43:57,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:43:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:43:57,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:43:57,978 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:43:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:43:58,947 INFO L93 Difference]: Finished difference Result 28225 states and 36926 transitions. [2020-12-22 09:43:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:43:58,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:43:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:43:58,967 INFO L225 Difference]: With dead ends: 28225 [2020-12-22 09:43:58,967 INFO L226 Difference]: Without dead ends: 10938 [2020-12-22 09:43:58,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:43:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2020-12-22 09:43:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 10938. [2020-12-22 09:43:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10938 states. [2020-12-22 09:43:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10938 states to 10938 states and 14590 transitions. [2020-12-22 09:43:59,951 INFO L78 Accepts]: Start accepts. Automaton has 10938 states and 14590 transitions. Word has length 82 [2020-12-22 09:43:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:43:59,951 INFO L481 AbstractCegarLoop]: Abstraction has 10938 states and 14590 transitions. [2020-12-22 09:43:59,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:43:59,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10938 states and 14590 transitions. [2020-12-22 09:43:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:43:59,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:43:59,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:43:59,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:43:59,954 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:43:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:43:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:43:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:43:59,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473074496] [2020-12-22 09:43:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:43:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:44:00,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473074496] [2020-12-22 09:44:00,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:00,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:00,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333338979] [2020-12-22 09:44:00,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:00,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:00,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:00,033 INFO L87 Difference]: Start difference. First operand 10938 states and 14590 transitions. Second operand 6 states. [2020-12-22 09:44:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:00,891 INFO L93 Difference]: Finished difference Result 17371 states and 22838 transitions. [2020-12-22 09:44:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:00,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:44:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:00,902 INFO L225 Difference]: With dead ends: 17371 [2020-12-22 09:44:00,903 INFO L226 Difference]: Without dead ends: 8821 [2020-12-22 09:44:00,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2020-12-22 09:44:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2020-12-22 09:44:01,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 09:44:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 11812 transitions. [2020-12-22 09:44:01,664 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 11812 transitions. Word has length 82 [2020-12-22 09:44:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:01,664 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 11812 transitions. [2020-12-22 09:44:01,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 11812 transitions. [2020-12-22 09:44:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:44:01,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:01,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:01,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:44:01,667 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:44:01,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:01,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124988422] [2020-12-22 09:44:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:44:01,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124988422] [2020-12-22 09:44:01,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:01,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044590437] [2020-12-22 09:44:01,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:01,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:01,736 INFO L87 Difference]: Start difference. First operand 8821 states and 11812 transitions. Second operand 6 states. [2020-12-22 09:44:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:02,864 INFO L93 Difference]: Finished difference Result 19291 states and 25248 transitions. [2020-12-22 09:44:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:02,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:44:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:02,882 INFO L225 Difference]: With dead ends: 19291 [2020-12-22 09:44:02,882 INFO L226 Difference]: Without dead ends: 12794 [2020-12-22 09:44:02,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2020-12-22 09:44:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 11824. [2020-12-22 09:44:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11824 states. [2020-12-22 09:44:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 15615 transitions. [2020-12-22 09:44:03,949 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 15615 transitions. Word has length 82 [2020-12-22 09:44:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:03,949 INFO L481 AbstractCegarLoop]: Abstraction has 11824 states and 15615 transitions. [2020-12-22 09:44:03,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 15615 transitions. [2020-12-22 09:44:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:03,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:03,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:03,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:44:03,951 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:03,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:03,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:44:03,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:03,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790858475] [2020-12-22 09:44:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790858475] [2020-12-22 09:44:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087668208] [2020-12-22 09:44:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:04,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:44:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:04,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:44:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:04,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:04,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:44:04,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992053591] [2020-12-22 09:44:04,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:44:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:44:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:44:04,826 INFO L87 Difference]: Start difference. First operand 11824 states and 15615 transitions. Second operand 17 states. [2020-12-22 09:44:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:10,518 INFO L93 Difference]: Finished difference Result 49237 states and 62351 transitions. [2020-12-22 09:44:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:44:10,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:44:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:10,566 INFO L225 Difference]: With dead ends: 49237 [2020-12-22 09:44:10,566 INFO L226 Difference]: Without dead ends: 41211 [2020-12-22 09:44:10,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:44:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41211 states. [2020-12-22 09:44:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41211 to 26445. [2020-12-22 09:44:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26445 states. [2020-12-22 09:44:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26445 states to 26445 states and 34001 transitions. [2020-12-22 09:44:13,499 INFO L78 Accepts]: Start accepts. Automaton has 26445 states and 34001 transitions. Word has length 83 [2020-12-22 09:44:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:13,499 INFO L481 AbstractCegarLoop]: Abstraction has 26445 states and 34001 transitions. [2020-12-22 09:44:13,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:44:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 26445 states and 34001 transitions. [2020-12-22 09:44:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:44:13,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:13,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:13,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:13,718 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:44:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:13,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057211081] [2020-12-22 09:44:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:44:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057211081] [2020-12-22 09:44:13,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:13,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422470323] [2020-12-22 09:44:13,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:13,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:13,839 INFO L87 Difference]: Start difference. First operand 26445 states and 34001 transitions. Second operand 6 states. [2020-12-22 09:44:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:16,380 INFO L93 Difference]: Finished difference Result 44728 states and 56973 transitions. [2020-12-22 09:44:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:16,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:44:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:16,401 INFO L225 Difference]: With dead ends: 44728 [2020-12-22 09:44:16,401 INFO L226 Difference]: Without dead ends: 20771 [2020-12-22 09:44:16,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:16,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20771 states. [2020-12-22 09:44:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20771 to 20771. [2020-12-22 09:44:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20771 states. [2020-12-22 09:44:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20771 states to 20771 states and 26465 transitions. [2020-12-22 09:44:18,819 INFO L78 Accepts]: Start accepts. Automaton has 20771 states and 26465 transitions. Word has length 83 [2020-12-22 09:44:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:18,819 INFO L481 AbstractCegarLoop]: Abstraction has 20771 states and 26465 transitions. [2020-12-22 09:44:18,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20771 states and 26465 transitions. [2020-12-22 09:44:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:44:18,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:18,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:18,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:44:18,822 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:18,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:44:18,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:18,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574766244] [2020-12-22 09:44:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574766244] [2020-12-22 09:44:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539312170] [2020-12-22 09:44:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:44:20,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:21,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:44:21,475 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:44:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:22,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:22,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:44:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621890283] [2020-12-22 09:44:22,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:44:22,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:44:22,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:44:22,261 INFO L87 Difference]: Start difference. First operand 20771 states and 26465 transitions. Second operand 39 states. [2020-12-22 09:44:22,746 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-12-22 09:44:23,443 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-12-22 09:44:24,210 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-12-22 09:44:24,452 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-22 09:44:24,691 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-12-22 09:44:25,001 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-22 09:44:25,303 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-22 09:44:25,704 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-12-22 09:44:26,198 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2020-12-22 09:44:26,845 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 100 [2020-12-22 09:44:27,464 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-12-22 09:44:27,864 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:44:28,302 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-12-22 09:44:28,660 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:44:29,146 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:44:29,585 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 09:44:29,986 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:44:30,435 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:44:30,669 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:44:31,044 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:44:31,569 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:44:32,028 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:44:32,399 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:44:32,786 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:44:33,077 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:44:33,387 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:44:33,816 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:44:34,143 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:44:34,366 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:44:34,859 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:44:35,163 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:44:35,472 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:44:35,864 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-12-22 09:44:36,309 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:44:36,545 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:44:37,091 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:44:37,421 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:44:37,651 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:44:37,896 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:44:38,448 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:44:38,715 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:44:38,979 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 09:44:39,387 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:44:39,779 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:44:40,129 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:44:40,652 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:44:41,248 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:44:42,334 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 09:44:42,812 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-22 09:44:43,559 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-12-22 09:44:44,096 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-12-22 09:44:44,453 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:44:44,769 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:44:45,227 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:44:45,498 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:44:45,902 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:44:46,355 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:44:46,682 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:44:47,439 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:44:47,972 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:44:48,425 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:44:48,692 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:44:49,061 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:44:49,588 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:44:50,490 WARN L197 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-12-22 09:44:50,837 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:44:51,299 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:44:51,636 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:44:52,582 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:44:53,271 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:44:55,123 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:44:55,695 WARN L197 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:44:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:56,738 INFO L93 Difference]: Finished difference Result 34675 states and 43895 transitions. [2020-12-22 09:44:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 09:44:56,740 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-12-22 09:44:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:56,767 INFO L225 Difference]: With dead ends: 34675 [2020-12-22 09:44:56,767 INFO L226 Difference]: Without dead ends: 27079 [2020-12-22 09:44:56,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=2385, Invalid=12867, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 09:44:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-12-22 09:44:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 18820. [2020-12-22 09:44:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18820 states. [2020-12-22 09:44:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18820 states to 18820 states and 24108 transitions. [2020-12-22 09:44:59,158 INFO L78 Accepts]: Start accepts. Automaton has 18820 states and 24108 transitions. Word has length 84 [2020-12-22 09:44:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:59,159 INFO L481 AbstractCegarLoop]: Abstraction has 18820 states and 24108 transitions. [2020-12-22 09:44:59,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:44:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18820 states and 24108 transitions. [2020-12-22 09:44:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:44:59,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:59,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:59,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:44:59,362 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:44:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:59,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321516205] [2020-12-22 09:44:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:59,777 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321516205] [2020-12-22 09:45:00,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281538060] [2020-12-22 09:45:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:45:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:00,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:00,924 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 33 [2020-12-22 09:45:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:01,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:01,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2020-12-22 09:45:01,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590363588] [2020-12-22 09:45:01,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:45:01,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:01,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:45:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:45:01,387 INFO L87 Difference]: Start difference. First operand 18820 states and 24108 transitions. Second operand 24 states. [2020-12-22 09:45:01,559 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:02,141 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:45:02,286 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 09:45:02,512 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-12-22 09:45:02,759 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 09:45:03,211 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:45:03,509 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:45:03,858 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:45:04,266 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:45:04,674 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:45:05,140 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-12-22 09:45:05,457 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-12-22 09:45:05,803 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-12-22 09:45:06,000 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 09:45:06,257 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:45:06,467 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 09:45:06,693 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:45:06,967 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:45:07,347 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 09:45:09,475 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:45:09,774 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:45:09,969 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:45:10,172 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:45:10,395 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 09:45:10,638 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:45:12,232 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:14,750 INFO L93 Difference]: Finished difference Result 31048 states and 39838 transitions. [2020-12-22 09:45:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 09:45:14,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2020-12-22 09:45:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:14,769 INFO L225 Difference]: With dead ends: 31048 [2020-12-22 09:45:14,769 INFO L226 Difference]: Without dead ends: 20179 [2020-12-22 09:45:14,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=895, Invalid=4507, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 09:45:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20179 states. [2020-12-22 09:45:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20179 to 12419. [2020-12-22 09:45:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12419 states. [2020-12-22 09:45:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12419 states to 12419 states and 16417 transitions. [2020-12-22 09:45:16,300 INFO L78 Accepts]: Start accepts. Automaton has 12419 states and 16417 transitions. Word has length 84 [2020-12-22 09:45:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:16,301 INFO L481 AbstractCegarLoop]: Abstraction has 12419 states and 16417 transitions. [2020-12-22 09:45:16,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:45:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 12419 states and 16417 transitions. [2020-12-22 09:45:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:45:16,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:16,302 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] [2020-12-22 09:45:16,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:45:16,516 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -68902190, now seen corresponding path program 1 times [2020-12-22 09:45:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:16,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277112864] [2020-12-22 09:45:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:17,348 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-12-22 09:45:17,843 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 09:45:17,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277112864] [2020-12-22 09:45:17,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22381927] [2020-12-22 09:45:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:45:17,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:18,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:45:18,802 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2020-12-22 09:45:19,443 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 09:45:19,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:19,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2020-12-22 09:45:19,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943507943] [2020-12-22 09:45:19,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:45:19,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:45:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:45:19,446 INFO L87 Difference]: Start difference. First operand 12419 states and 16417 transitions. Second operand 30 states. [2020-12-22 09:45:19,740 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-12-22 09:45:20,132 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-12-22 09:45:20,312 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-12-22 09:45:20,546 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-12-22 09:45:20,942 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-12-22 09:45:21,427 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2020-12-22 09:45:22,303 WARN L197 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-12-22 09:45:22,988 WARN L197 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-12-22 09:45:23,647 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-22 09:45:23,987 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 09:45:24,264 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:45:24,789 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2020-12-22 09:45:25,468 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-12-22 09:45:25,816 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-22 09:45:26,416 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:26,704 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:45:27,373 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-12-22 09:45:28,431 WARN L197 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-12-22 09:45:29,004 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-12-22 09:45:29,326 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-12-22 09:45:29,907 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:45:30,931 WARN L197 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2020-12-22 09:45:31,793 WARN L197 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-12-22 09:45:32,323 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:45:33,061 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-12-22 09:45:33,693 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-12-22 09:45:34,652 WARN L197 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2020-12-22 09:45:35,386 WARN L197 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 09:45:36,278 WARN L197 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-12-22 09:45:37,081 WARN L197 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-12-22 09:45:37,488 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 09:45:38,100 WARN L197 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-12-22 09:45:38,507 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 09:45:38,812 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:45:39,463 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2020-12-22 09:45:39,999 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-22 09:45:40,621 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-22 09:45:42,174 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-12-22 09:45:43,136 WARN L197 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-12-22 09:45:43,675 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2020-12-22 09:45:44,642 WARN L197 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-12-22 09:45:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:45,784 INFO L93 Difference]: Finished difference Result 21223 states and 27764 transitions. [2020-12-22 09:45:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:45:45,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-12-22 09:45:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:45,802 INFO L225 Difference]: With dead ends: 21223 [2020-12-22 09:45:45,802 INFO L226 Difference]: Without dead ends: 16804 [2020-12-22 09:45:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1136, Invalid=5184, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:45:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16804 states. [2020-12-22 09:45:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16804 to 10858. [2020-12-22 09:45:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10858 states. [2020-12-22 09:45:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10858 states to 10858 states and 14476 transitions. [2020-12-22 09:45:47,192 INFO L78 Accepts]: Start accepts. Automaton has 10858 states and 14476 transitions. Word has length 86 [2020-12-22 09:45:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:47,193 INFO L481 AbstractCegarLoop]: Abstraction has 10858 states and 14476 transitions. [2020-12-22 09:45:47,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:45:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 10858 states and 14476 transitions. [2020-12-22 09:45:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:45:47,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:47,196 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 09:45:47,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:47,401 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1258955765, now seen corresponding path program 1 times [2020-12-22 09:45:47,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:47,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262013641] [2020-12-22 09:45:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262013641] [2020-12-22 09:45:47,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:47,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:47,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167829546] [2020-12-22 09:45:47,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:45:47,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:45:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:45:47,570 INFO L87 Difference]: Start difference. First operand 10858 states and 14476 transitions. Second operand 4 states. [2020-12-22 09:46:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:01,995 INFO L93 Difference]: Finished difference Result 14652 states and 20839 transitions. [2020-12-22 09:46:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:46:01,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:46:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:02,007 INFO L225 Difference]: With dead ends: 14652 [2020-12-22 09:46:02,007 INFO L226 Difference]: Without dead ends: 12360 [2020-12-22 09:46:02,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:46:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12360 states. [2020-12-22 09:46:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12360 to 11609. [2020-12-22 09:46:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11609 states. [2020-12-22 09:46:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11609 states to 11609 states and 15229 transitions. [2020-12-22 09:46:03,362 INFO L78 Accepts]: Start accepts. Automaton has 11609 states and 15229 transitions. Word has length 132 [2020-12-22 09:46:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:03,363 INFO L481 AbstractCegarLoop]: Abstraction has 11609 states and 15229 transitions. [2020-12-22 09:46:03,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:46:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11609 states and 15229 transitions. [2020-12-22 09:46:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:46:03,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:03,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-12-22 09:46:03,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:46:03,366 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:46:03,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:03,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197866560] [2020-12-22 09:46:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:03,767 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:46:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197866560] [2020-12-22 09:46:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832201810] [2020-12-22 09:46:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:46:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:46:04,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:04,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:46:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768311711] [2020-12-22 09:46:04,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:46:04,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:04,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:46:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:46:04,569 INFO L87 Difference]: Start difference. First operand 11609 states and 15229 transitions. Second operand 15 states. [2020-12-22 09:46:04,731 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:46:05,310 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:46:05,594 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:46:05,781 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:46:06,173 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:06,492 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:46:06,866 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:46:07,070 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:07,280 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:07,575 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:07,767 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:46:07,972 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:46:08,798 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:46:09,471 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:46:09,699 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:09,930 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:46:10,319 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:46:10,533 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:46:10,712 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:46:11,349 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:46:12,115 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:46:12,306 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:46:12,495 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:46:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:12,923 INFO L93 Difference]: Finished difference Result 24228 states and 31163 transitions. [2020-12-22 09:46:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:46:12,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:46:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:12,941 INFO L225 Difference]: With dead ends: 24228 [2020-12-22 09:46:12,942 INFO L226 Difference]: Without dead ends: 16250 [2020-12-22 09:46:12,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:46:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16250 states. [2020-12-22 09:46:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16250 to 16138. [2020-12-22 09:46:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-12-22 09:46:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20311 transitions. [2020-12-22 09:46:15,185 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20311 transitions. Word has length 135 [2020-12-22 09:46:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:15,185 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20311 transitions. [2020-12-22 09:46:15,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:46:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20311 transitions. [2020-12-22 09:46:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:46:15,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:15,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 09:46:15,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 09:46:15,393 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:46:15,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:15,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392066665] [2020-12-22 09:46:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:15,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392066665] [2020-12-22 09:46:15,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236760516] [2020-12-22 09:46:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:46:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:16,493 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-22 09:46:17,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:46:17,417 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 29 [2020-12-22 09:46:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 20 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:17,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:17,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:46:17,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107713945] [2020-12-22 09:46:17,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:46:17,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:46:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:46:17,945 INFO L87 Difference]: Start difference. First operand 16138 states and 20311 transitions. Second operand 22 states. [2020-12-22 09:46:18,259 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:46:18,621 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:46:18,974 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:46:19,578 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:46:19,940 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:46:20,195 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:46:20,863 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:46:21,396 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 09:46:22,037 WARN L197 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:46:22,578 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:46:23,786 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:46:25,659 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:46:27,168 WARN L197 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 106 [2020-12-22 09:46:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:29,598 INFO L93 Difference]: Finished difference Result 24038 states and 29927 transitions. [2020-12-22 09:46:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 09:46:29,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-12-22 09:46:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:29,619 INFO L225 Difference]: With dead ends: 24038 [2020-12-22 09:46:29,620 INFO L226 Difference]: Without dead ends: 18122 [2020-12-22 09:46:29,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=336, Invalid=996, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:46:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2020-12-22 09:46:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 16138. [2020-12-22 09:46:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16138 states. [2020-12-22 09:46:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 20209 transitions. [2020-12-22 09:46:32,418 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 20209 transitions. Word has length 136 [2020-12-22 09:46:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:32,418 INFO L481 AbstractCegarLoop]: Abstraction has 16138 states and 20209 transitions. [2020-12-22 09:46:32,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:46:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 20209 transitions. [2020-12-22 09:46:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:46:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:32,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2020-12-22 09:46:32,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:32,623 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:32,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1426411414, now seen corresponding path program 1 times [2020-12-22 09:46:32,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:32,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803893342] [2020-12-22 09:46:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:33,232 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 09:46:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 33 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:33,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803893342] [2020-12-22 09:46:33,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19024705] [2020-12-22 09:46:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:46:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:34,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:46:34,478 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:34,854 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:35,465 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:36,668 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:37,849 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:39,223 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:40,882 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:42,583 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:44,502 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:46,717 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:48,402 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:50,583 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:52,605 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:54,930 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:56,652 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:46:58,866 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:47:01,445 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:47:03,881 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.