/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:17,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:17,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:17,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:17,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:17,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:17,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:17,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:17,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:17,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:17,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:17,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:17,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:17,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:17,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:17,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:17,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:17,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:17,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:17,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:17,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:17,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:17,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:17,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:17,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:17,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:48:17,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:48:17,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:48:17,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:48:17,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:48:17,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:48:17,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:48:17,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:48:17,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:17,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:17,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:17,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:17,783 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:17,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:17,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:17,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:17,788 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:17,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:17,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:17,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:17,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:17,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:17,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:17,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:17,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:17,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:17,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:17,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:17,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:17,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:17,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:17,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:17,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:17,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:17,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:17,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:17,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:17,794 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:18,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:18,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:18,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:18,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:18,261 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:18,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:48:18,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/453cefcf7/15825ff885024c68ab20e7d8ba435e65/FLAG3c2a9b577 [2020-12-22 09:48:19,443 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:19,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:48:19,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/453cefcf7/15825ff885024c68ab20e7d8ba435e65/FLAG3c2a9b577 [2020-12-22 09:48:19,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/453cefcf7/15825ff885024c68ab20e7d8ba435e65 [2020-12-22 09:48:19,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:19,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:19,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:19,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:19,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:19,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:19,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6645f94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19, skipping insertion in model container [2020-12-22 09:48:19,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:19,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:20,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:20,415 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c[8784,8797] [2020-12-22 09:48:20,481 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c[15477,15490] [2020-12-22 09:48:21,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:21,600 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:21,668 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c[8784,8797] [2020-12-22 09:48:21,680 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c[15477,15490] [2020-12-22 09:48:22,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:22,351 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:22,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22 WrapperNode [2020-12-22 09:48:22,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:22,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:22,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:22,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:22,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:22,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:22,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:22,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:22,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:22,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:22,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:22,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:22,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:22,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:23,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:23,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:23,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (1/1) ... [2020-12-22 09:48:23,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:23,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:23,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:23,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:23,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (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 09:48:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:23,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:48:28,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:48:28,679 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:48:28,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:28 BoogieIcfgContainer [2020-12-22 09:48:28,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:48:28,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:48:28,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:48:28,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:48:28,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:19" (1/3) ... [2020-12-22 09:48:28,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cad93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:28, skipping insertion in model container [2020-12-22 09:48:28,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:22" (2/3) ... [2020-12-22 09:48:28,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cad93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:28, skipping insertion in model container [2020-12-22 09:48:28,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:28" (3/3) ... [2020-12-22 09:48:28,691 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:48:28,698 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:48:28,704 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:48:28,724 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:48:28,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:48:28,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:48:28,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:48:28,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:48:28,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:48:28,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:48:28,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:48:28,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:48:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:48:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:28,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:28,803 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 09:48:28,803 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:48:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:28,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135350270] [2020-12-22 09:48:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:29,051 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 09:48:29,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135350270] [2020-12-22 09:48:29,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:29,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:29,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674019852] [2020-12-22 09:48:29,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:48:29,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:48:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:48:29,081 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:48:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:29,171 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:48:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:48:29,172 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:48:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:29,196 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:48:29,197 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:48:29,205 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 09:48:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:48:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:48:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:48:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:48:29,324 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:48:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:29,327 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:48:29,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:48:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:48:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:29,329 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 09:48:29,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:48:29,330 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:48:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:29,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108768360] [2020-12-22 09:48:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:29,466 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 09:48:29,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108768360] [2020-12-22 09:48:29,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:29,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:29,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911516066] [2020-12-22 09:48:29,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:29,474 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:48:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:29,606 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:48:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:48:29,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:48:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:29,614 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:48:29,614 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:48:29,616 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 09:48:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:48:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:48:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:48:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:48:29,651 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:48:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:48:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:48:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:48:29,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:29,661 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 09:48:29,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:48:29,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:48:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272651361] [2020-12-22 09:48:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:29,825 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 09:48:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272651361] [2020-12-22 09:48:29,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:29,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469472208] [2020-12-22 09:48:29,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:29,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:29,828 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:48:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,032 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:48:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:48:30,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:48:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,043 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:48:30,044 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:48:30,045 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 09:48:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:48:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:48:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:48:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:48:30,083 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:48:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,085 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:48:30,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:48:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:30,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,088 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 09:48:30,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:48:30,088 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:48:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74460533] [2020-12-22 09:48:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,294 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 09:48:30,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74460533] [2020-12-22 09:48:30,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:30,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290954993] [2020-12-22 09:48:30,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,297 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:48:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,348 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:48:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:30,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,355 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:48:30,356 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:48:30,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:48:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:48:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:48:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:48:30,388 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:48:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,391 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:48:30,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:48:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:30,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,392 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 09:48:30,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:48:30,392 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:48:30,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271070751] [2020-12-22 09:48:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,604 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 09:48:30,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271070751] [2020-12-22 09:48:30,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:30,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386799880] [2020-12-22 09:48:30,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:30,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:30,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:30,608 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:48:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,755 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:48:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:30,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:48:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,761 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:48:30,762 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:48:30,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:48:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:48:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:48:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:48:30,789 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:48:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,790 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:48:30,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:48:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:30,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,791 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 09:48:30,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:48:30,791 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:48:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835300875] [2020-12-22 09:48:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,879 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 09:48:30,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835300875] [2020-12-22 09:48:30,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:30,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095270519] [2020-12-22 09:48:30,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,884 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:48:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,930 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:48:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:30,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,937 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:48:30,938 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:48:30,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:48:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:48:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:48:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:48:31,034 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:48:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,035 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:48:31,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:48:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:31,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,036 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 09:48:31,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:48:31,040 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:48:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113343052] [2020-12-22 09:48:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,096 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 09:48:31,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113343052] [2020-12-22 09:48:31,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385139788] [2020-12-22 09:48:31,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,099 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:48:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,152 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:48:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,160 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:48:31,160 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:48:31,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:48:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:48:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:48:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:48:31,210 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:48:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,211 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:48:31,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:48:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:31,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,212 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 09:48:31,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:48:31,212 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:48:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280821014] [2020-12-22 09:48:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,295 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 09:48:31,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280821014] [2020-12-22 09:48:31,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599528281] [2020-12-22 09:48:31,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,299 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:48:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,361 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:48:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,373 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:48:31,374 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:48:31,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:48:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:48:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:48:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:48:31,453 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:48:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,454 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:48:31,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:48:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:48:31,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,456 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 09:48:31,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:48:31,456 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:48:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511117997] [2020-12-22 09:48:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,562 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 09:48:31,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511117997] [2020-12-22 09:48:31,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070872515] [2020-12-22 09:48:31,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:31,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:31,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:31,567 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:48:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,733 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:48:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:48:31,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:48:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,747 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:48:31,747 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:48:31,749 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 09:48:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:48:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:48:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:48:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:48:31,858 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:48:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,859 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:48:31,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:48:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:48:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,860 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 09:48:31,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:48:31,860 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:48:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179034814] [2020-12-22 09:48:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,919 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 09:48:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179034814] [2020-12-22 09:48:31,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392607527] [2020-12-22 09:48:31,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,921 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:48:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,038 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:48:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:32,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:48:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,049 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:48:32,050 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:48:32,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:48:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:48:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:48:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:48:32,167 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:48:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:32,168 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:48:32,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:48:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:48:32,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:32,169 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] [2020-12-22 09:48:32,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:48:32,169 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:32,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -772730747, now seen corresponding path program 1 times [2020-12-22 09:48:32,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:32,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688396756] [2020-12-22 09:48:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:32,229 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 09:48:32,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688396756] [2020-12-22 09:48:32,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:32,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:32,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636120798] [2020-12-22 09:48:32,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:32,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:32,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:32,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:32,233 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 3 states. [2020-12-22 09:48:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:37,507 INFO L93 Difference]: Finished difference Result 3787 states and 6496 transitions. [2020-12-22 09:48:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:37,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 09:48:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:37,524 INFO L225 Difference]: With dead ends: 3787 [2020-12-22 09:48:37,524 INFO L226 Difference]: Without dead ends: 3034 [2020-12-22 09:48:37,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2020-12-22 09:48:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 3034. [2020-12-22 09:48:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:48:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4602 transitions. [2020-12-22 09:48:37,652 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4602 transitions. Word has length 60 [2020-12-22 09:48:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:37,653 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4602 transitions. [2020-12-22 09:48:37,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4602 transitions. [2020-12-22 09:48:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:37,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:37,655 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 09:48:37,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:48:37,656 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:48:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:37,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633317972] [2020-12-22 09:48:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:37,740 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 09:48:37,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633317972] [2020-12-22 09:48:37,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:37,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:37,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665489928] [2020-12-22 09:48:37,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:37,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:37,743 INFO L87 Difference]: Start difference. First operand 3034 states and 4602 transitions. Second operand 6 states. [2020-12-22 09:48:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:38,189 INFO L93 Difference]: Finished difference Result 9340 states and 13643 transitions. [2020-12-22 09:48:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:38,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:38,253 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:48:38,253 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:48:38,259 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 09:48:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:48:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:48:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:48:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6730 transitions. [2020-12-22 09:48:38,537 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6730 transitions. Word has length 78 [2020-12-22 09:48:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:38,538 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6730 transitions. [2020-12-22 09:48:38,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6730 transitions. [2020-12-22 09:48:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:38,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:38,540 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 09:48:38,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:48:38,541 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:38,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:38,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:48:38,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:38,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692717693] [2020-12-22 09:48:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:38,626 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 09:48:38,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692717693] [2020-12-22 09:48:38,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:38,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963070707] [2020-12-22 09:48:38,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:38,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:38,633 INFO L87 Difference]: Start difference. First operand 4530 states and 6730 transitions. Second operand 6 states. [2020-12-22 09:48:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:39,248 INFO L93 Difference]: Finished difference Result 10836 states and 15771 transitions. [2020-12-22 09:48:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:39,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:39,273 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:48:39,274 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:48:39,279 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 09:48:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:48:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:48:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:48:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9902 transitions. [2020-12-22 09:48:39,669 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9902 transitions. Word has length 78 [2020-12-22 09:48:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:39,669 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9902 transitions. [2020-12-22 09:48:39,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9902 transitions. [2020-12-22 09:48:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:39,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:39,672 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 09:48:39,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:48:39,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:39,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:39,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:48:39,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:39,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603319031] [2020-12-22 09:48:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:39,766 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 09:48:39,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603319031] [2020-12-22 09:48:39,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:39,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:39,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164805242] [2020-12-22 09:48:39,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:39,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:39,768 INFO L87 Difference]: Start difference. First operand 6778 states and 9902 transitions. Second operand 6 states. [2020-12-22 09:48:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:40,386 INFO L93 Difference]: Finished difference Result 12332 states and 17899 transitions. [2020-12-22 09:48:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:40,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:40,415 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:48:40,416 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:48:40,425 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 09:48:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:48:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:48:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:48:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12030 transitions. [2020-12-22 09:48:41,107 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12030 transitions. Word has length 78 [2020-12-22 09:48:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:41,108 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12030 transitions. [2020-12-22 09:48:41,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12030 transitions. [2020-12-22 09:48:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:41,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:41,111 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 09:48:41,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:48:41,112 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:48:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:41,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151221597] [2020-12-22 09:48:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,179 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 09:48:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151221597] [2020-12-22 09:48:41,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:41,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312173605] [2020-12-22 09:48:41,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:41,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:41,182 INFO L87 Difference]: Start difference. First operand 8274 states and 12030 transitions. Second operand 3 states. [2020-12-22 09:48:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:41,495 INFO L93 Difference]: Finished difference Result 13055 states and 18902 transitions. [2020-12-22 09:48:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:41,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:48:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:41,512 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:48:41,512 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:48:41,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:48:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:48:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:48:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9247 transitions. [2020-12-22 09:48:41,873 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9247 transitions. Word has length 80 [2020-12-22 09:48:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:41,873 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9247 transitions. [2020-12-22 09:48:41,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9247 transitions. [2020-12-22 09:48:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:41,876 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 09:48:41,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:48:41,876 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:48:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:41,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052161714] [2020-12-22 09:48:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,981 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 09:48:41,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052161714] [2020-12-22 09:48:41,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:41,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013993200] [2020-12-22 09:48:41,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:41,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:41,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:41,986 INFO L87 Difference]: Start difference. First operand 6315 states and 9247 transitions. Second operand 6 states. [2020-12-22 09:48:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,630 INFO L93 Difference]: Finished difference Result 10549 states and 15332 transitions. [2020-12-22 09:48:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:42,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:48:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,651 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:48:42,651 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:48:42,656 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 09:48:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:48:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:48:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:48:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 10751 transitions. [2020-12-22 09:48:43,137 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 10751 transitions. Word has length 80 [2020-12-22 09:48:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,138 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 10751 transitions. [2020-12-22 09:48:43,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 10751 transitions. [2020-12-22 09:48:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:43,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,141 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 09:48:43,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:48:43,142 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:48:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401726704] [2020-12-22 09:48:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,236 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 09:48:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401726704] [2020-12-22 09:48:43,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854314746] [2020-12-22 09:48:43,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,239 INFO L87 Difference]: Start difference. First operand 7371 states and 10751 transitions. Second operand 3 states. [2020-12-22 09:48:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,461 INFO L93 Difference]: Finished difference Result 10279 states and 14889 transitions. [2020-12-22 09:48:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:43,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,471 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:48:43,471 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:48:43,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:48:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:48:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:48:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6571 transitions. [2020-12-22 09:48:43,736 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6571 transitions. Word has length 81 [2020-12-22 09:48:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,736 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6571 transitions. [2020-12-22 09:48:43,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6571 transitions. [2020-12-22 09:48:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:43,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,742 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 09:48:43,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:48:43,742 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:48:43,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873659064] [2020-12-22 09:48:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,814 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 09:48:43,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873659064] [2020-12-22 09:48:43,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826358923] [2020-12-22 09:48:43,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:43,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,819 INFO L87 Difference]: Start difference. First operand 4467 states and 6571 transitions. Second operand 3 states. [2020-12-22 09:48:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,956 INFO L93 Difference]: Finished difference Result 5923 states and 8619 transitions. [2020-12-22 09:48:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:43,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,964 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:48:43,964 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:48:43,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:48:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:48:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:48:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4503 transitions. [2020-12-22 09:48:44,105 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4503 transitions. Word has length 81 [2020-12-22 09:48:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:44,105 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4503 transitions. [2020-12-22 09:48:44,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4503 transitions. [2020-12-22 09:48:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:44,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,107 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 09:48:44,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:48:44,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:48:44,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738547209] [2020-12-22 09:48:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,168 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 09:48:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738547209] [2020-12-22 09:48:44,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:44,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:44,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552817819] [2020-12-22 09:48:44,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:44,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:44,171 INFO L87 Difference]: Start difference. First operand 3015 states and 4503 transitions. Second operand 3 states. [2020-12-22 09:48:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:44,241 INFO L93 Difference]: Finished difference Result 3745 states and 5517 transitions. [2020-12-22 09:48:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:44,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:44,246 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:48:44,246 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:48:44,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:48:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:48:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:48:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3480 transitions. [2020-12-22 09:48:44,323 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3480 transitions. Word has length 81 [2020-12-22 09:48:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:44,323 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3480 transitions. [2020-12-22 09:48:44,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3480 transitions. [2020-12-22 09:48:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:44,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,325 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 09:48:44,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:48:44,326 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:48:44,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781248985] [2020-12-22 09:48:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,578 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 09:48:44,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781248985] [2020-12-22 09:48:44,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8726758] [2020-12-22 09:48:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:48:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:48:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:45,062 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 09:48:45,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:45,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:48:45,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658610158] [2020-12-22 09:48:45,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:48:45,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:45,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:48:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:48:45,065 INFO L87 Difference]: Start difference. First operand 2289 states and 3480 transitions. Second operand 12 states. [2020-12-22 09:48:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:46,523 INFO L93 Difference]: Finished difference Result 5722 states and 8129 transitions. [2020-12-22 09:48:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:48:46,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:48:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:46,534 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:48:46,534 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:48:46,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:48:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:48:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:48:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:48:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5769 transitions. [2020-12-22 09:48:46,837 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5769 transitions. Word has length 81 [2020-12-22 09:48:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:46,838 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 5769 transitions. [2020-12-22 09:48:46,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:48:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5769 transitions. [2020-12-22 09:48:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:46,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:46,840 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 09:48:47,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:47,054 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:48:47,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:47,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750561973] [2020-12-22 09:48:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:47,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750561973] [2020-12-22 09:48:47,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662009743] [2020-12-22 09:48:47,266 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 09:48:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:48:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:47,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:47,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:47,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612504230] [2020-12-22 09:48:47,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:47,890 INFO L87 Difference]: Start difference. First operand 4081 states and 5769 transitions. Second operand 17 states. [2020-12-22 09:48:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:50,738 INFO L93 Difference]: Finished difference Result 14199 states and 18925 transitions. [2020-12-22 09:48:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:50,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:48:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:50,765 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:48:50,765 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:48:50,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:48:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:48:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:48:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:48:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 10951 transitions. [2020-12-22 09:48:51,407 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 10951 transitions. Word has length 82 [2020-12-22 09:48:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,408 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 10951 transitions. [2020-12-22 09:48:51,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:48:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 10951 transitions. [2020-12-22 09:48:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:51,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,410 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 09:48:51,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:51,624 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:48:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226429552] [2020-12-22 09:48:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,859 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 09:48:51,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226429552] [2020-12-22 09:48:51,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632405581] [2020-12-22 09:48:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:48:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:52,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:52,340 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 09:48:52,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:52,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:52,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38521435] [2020-12-22 09:48:52,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:52,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:52,342 INFO L87 Difference]: Start difference. First operand 8112 states and 10951 transitions. Second operand 17 states. [2020-12-22 09:48:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:55,473 INFO L93 Difference]: Finished difference Result 32062 states and 42174 transitions. [2020-12-22 09:48:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:55,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:48:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:55,533 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:48:55,533 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:48:55,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:48:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:48:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:48:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:48:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 24685 transitions. [2020-12-22 09:48:57,588 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 24685 transitions. Word has length 82 [2020-12-22 09:48:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:57,588 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 24685 transitions. [2020-12-22 09:48:57,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:48:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 24685 transitions. [2020-12-22 09:48:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:57,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:57,591 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 09:48:57,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:48:57,792 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:48:57,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:57,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673501720] [2020-12-22 09:48:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:57,878 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 09:48:57,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673501720] [2020-12-22 09:48:57,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:57,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026473862] [2020-12-22 09:48:57,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:57,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:57,881 INFO L87 Difference]: Start difference. First operand 18920 states and 24685 transitions. Second operand 6 states. [2020-12-22 09:48:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:59,324 INFO L93 Difference]: Finished difference Result 33364 states and 43285 transitions. [2020-12-22 09:48:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:59,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:48:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:59,360 INFO L225 Difference]: With dead ends: 33364 [2020-12-22 09:48:59,360 INFO L226 Difference]: Without dead ends: 16077 [2020-12-22 09:48:59,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2020-12-22 09:49:00,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 16077. [2020-12-22 09:49:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-12-22 09:49:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 20801 transitions. [2020-12-22 09:49:00,811 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 20801 transitions. Word has length 82 [2020-12-22 09:49:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 16077 states and 20801 transitions. [2020-12-22 09:49:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 20801 transitions. [2020-12-22 09:49:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:00,814 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 09:49:00,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:00,815 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:00,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682300525] [2020-12-22 09:49:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:00,893 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 09:49:00,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682300525] [2020-12-22 09:49:00,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:00,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:00,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485629150] [2020-12-22 09:49:00,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:00,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:00,896 INFO L87 Difference]: Start difference. First operand 16077 states and 20801 transitions. Second operand 6 states. [2020-12-22 09:49:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:02,348 INFO L93 Difference]: Finished difference Result 26822 states and 34466 transitions. [2020-12-22 09:49:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:02,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:02,369 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 09:49:02,369 INFO L226 Difference]: Without dead ends: 12404 [2020-12-22 09:49:02,386 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 09:49:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-12-22 09:49:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12404. [2020-12-22 09:49:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12404 states. [2020-12-22 09:49:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12404 states to 12404 states and 16023 transitions. [2020-12-22 09:49:03,484 INFO L78 Accepts]: Start accepts. Automaton has 12404 states and 16023 transitions. Word has length 82 [2020-12-22 09:49:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:03,484 INFO L481 AbstractCegarLoop]: Abstraction has 12404 states and 16023 transitions. [2020-12-22 09:49:03,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 12404 states and 16023 transitions. [2020-12-22 09:49:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:03,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:03,487 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 09:49:03,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:03,487 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:03,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:03,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195966002] [2020-12-22 09:49:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:03,554 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 09:49:03,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195966002] [2020-12-22 09:49:03,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:03,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113658090] [2020-12-22 09:49:03,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:03,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:03,556 INFO L87 Difference]: Start difference. First operand 12404 states and 16023 transitions. Second operand 6 states. [2020-12-22 09:49:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:04,449 INFO L93 Difference]: Finished difference Result 20759 states and 26584 transitions. [2020-12-22 09:49:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:04,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:04,464 INFO L225 Difference]: With dead ends: 20759 [2020-12-22 09:49:04,465 INFO L226 Difference]: Without dead ends: 9932 [2020-12-22 09:49:04,475 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 09:49:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2020-12-22 09:49:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 9932. [2020-12-22 09:49:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2020-12-22 09:49:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 12904 transitions. [2020-12-22 09:49:05,585 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 12904 transitions. Word has length 82 [2020-12-22 09:49:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:05,585 INFO L481 AbstractCegarLoop]: Abstraction has 9932 states and 12904 transitions. [2020-12-22 09:49:05,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 12904 transitions. [2020-12-22 09:49:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:05,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:05,588 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 09:49:05,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:49:05,588 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:05,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752308976] [2020-12-22 09:49:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:05,782 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 09:49:05,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752308976] [2020-12-22 09:49:05,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29910703] [2020-12-22 09:49:05,783 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 09:49:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:06,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:06,293 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 09:49:06,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:06,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373734724] [2020-12-22 09:49:06,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:06,295 INFO L87 Difference]: Start difference. First operand 9932 states and 12904 transitions. Second operand 17 states. [2020-12-22 09:49:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:11,029 INFO L93 Difference]: Finished difference Result 42734 states and 53344 transitions. [2020-12-22 09:49:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:11,029 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:11,072 INFO L225 Difference]: With dead ends: 42734 [2020-12-22 09:49:11,072 INFO L226 Difference]: Without dead ends: 35713 [2020-12-22 09:49:11,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35713 states. [2020-12-22 09:49:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35713 to 22851. [2020-12-22 09:49:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22851 states. [2020-12-22 09:49:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 28953 transitions. [2020-12-22 09:49:13,605 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 28953 transitions. Word has length 83 [2020-12-22 09:49:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:13,606 INFO L481 AbstractCegarLoop]: Abstraction has 22851 states and 28953 transitions. [2020-12-22 09:49:13,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 28953 transitions. [2020-12-22 09:49:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:13,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:13,608 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 09:49:13,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:13,823 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:13,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798108235] [2020-12-22 09:49:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:13,896 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 09:49:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798108235] [2020-12-22 09:49:13,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:13,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535405489] [2020-12-22 09:49:13,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:13,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:13,898 INFO L87 Difference]: Start difference. First operand 22851 states and 28953 transitions. Second operand 6 states. [2020-12-22 09:49:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:15,750 INFO L93 Difference]: Finished difference Result 38944 states and 48909 transitions. [2020-12-22 09:49:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:15,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:15,770 INFO L225 Difference]: With dead ends: 38944 [2020-12-22 09:49:15,770 INFO L226 Difference]: Without dead ends: 17826 [2020-12-22 09:49:15,784 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 09:49:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-12-22 09:49:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17826. [2020-12-22 09:49:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17826 states. [2020-12-22 09:49:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 22350 transitions. [2020-12-22 09:49:17,575 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 22350 transitions. Word has length 83 [2020-12-22 09:49:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:17,575 INFO L481 AbstractCegarLoop]: Abstraction has 17826 states and 22350 transitions. [2020-12-22 09:49:17,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 22350 transitions. [2020-12-22 09:49:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:17,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:17,578 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 09:49:17,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:49:17,578 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:17,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:17,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:17,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521108154] [2020-12-22 09:49:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:19,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521108154] [2020-12-22 09:49:19,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442335456] [2020-12-22 09:49:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:49:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:19,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:20,256 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 09:49:20,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:20,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:49:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855245904] [2020-12-22 09:49:20,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:49:20,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:49:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:49:20,263 INFO L87 Difference]: Start difference. First operand 17826 states and 22350 transitions. Second operand 40 states. [2020-12-22 09:49:20,631 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:49:21,935 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:49:22,149 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:49:22,423 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:49:22,829 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:49:23,245 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:49:23,627 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:49:24,088 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:49:24,541 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:49:24,827 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:25,122 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:25,339 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:25,641 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:25,873 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:26,177 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:26,403 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:26,816 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:49:27,030 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:49:27,489 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:49:27,903 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:49:28,250 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:28,994 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:49:29,226 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:29,454 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:30,207 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:30,410 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:30,580 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:30,976 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:31,696 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:33,150 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:34,226 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:49:34,518 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:49:34,729 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:35,164 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:35,400 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:49:35,710 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:49:35,908 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:36,108 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:36,429 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:49:36,887 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:49:37,384 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:49:37,634 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:49:37,934 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:38,305 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:49:38,536 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:49:38,733 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:39,290 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:49:39,463 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:39,747 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:40,650 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:43,489 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:49:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:44,598 INFO L93 Difference]: Finished difference Result 30408 states and 38180 transitions. [2020-12-22 09:49:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:49:44,599 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:49:44,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:44,629 INFO L225 Difference]: With dead ends: 30408 [2020-12-22 09:49:44,630 INFO L226 Difference]: Without dead ends: 24257 [2020-12-22 09:49:44,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:49:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2020-12-22 09:49:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 16024. [2020-12-22 09:49:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16024 states. [2020-12-22 09:49:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 20211 transitions. [2020-12-22 09:49:46,444 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 20211 transitions. Word has length 84 [2020-12-22 09:49:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:46,444 INFO L481 AbstractCegarLoop]: Abstraction has 16024 states and 20211 transitions. [2020-12-22 09:49:46,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:49:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 20211 transitions. [2020-12-22 09:49:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:46,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:46,446 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 09:49:46,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:49:46,662 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:49:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49371640] [2020-12-22 09:49:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:47,243 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 09:49:47,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49371640] [2020-12-22 09:49:47,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511731148] [2020-12-22 09:49:47,243 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 09:49:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:49:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:47,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:47,975 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:49:48,569 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 09:49:48,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:48,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:49:48,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509398537] [2020-12-22 09:49:48,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:49:48,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:48,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:49:48,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:49:48,571 INFO L87 Difference]: Start difference. First operand 16024 states and 20211 transitions. Second operand 23 states. [2020-12-22 09:49:49,348 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:49:49,524 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:49:49,885 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:49:50,083 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:49:50,325 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:49:50,708 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:51,121 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:51,546 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:51,898 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:49:52,282 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:49:52,596 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:49:52,999 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:49:53,469 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:49:53,703 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:49:54,049 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:49:54,543 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:49:55,262 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:49:56,137 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:49:56,380 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:49:56,656 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:49:57,148 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:49:57,469 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:49:58,050 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:49:58,284 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:49:58,445 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:49:59,240 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:49:59,442 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:49:59,857 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:00,150 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:00,315 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:00,827 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:01,040 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:01,488 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:01,672 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:50:01,892 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:50:02,408 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:50:02,694 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:50:03,226 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:50:03,555 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:50:04,069 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:50:04,533 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:50:05,049 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:50:05,556 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:07,105 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:50:07,591 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:50:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:09,135 INFO L93 Difference]: Finished difference Result 30140 states and 38336 transitions. [2020-12-22 09:50:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:50:09,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:50:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:09,154 INFO L225 Difference]: With dead ends: 30140 [2020-12-22 09:50:09,154 INFO L226 Difference]: Without dead ends: 21459 [2020-12-22 09:50:09,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:50:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2020-12-22 09:50:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 11771. [2020-12-22 09:50:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11771 states. [2020-12-22 09:50:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 15069 transitions. [2020-12-22 09:50:10,573 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 15069 transitions. Word has length 84 [2020-12-22 09:50:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:10,574 INFO L481 AbstractCegarLoop]: Abstraction has 11771 states and 15069 transitions. [2020-12-22 09:50:10,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:50:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 15069 transitions. [2020-12-22 09:50:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:50:10,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:10,575 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 09:50:10,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:50:10,790 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:50:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:10,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30868220] [2020-12-22 09:50:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:11,421 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 09:50:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30868220] [2020-12-22 09:50:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466851304] [2020-12-22 09:50:11,422 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 09:50:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:50:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:11,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:12,231 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:50:12,696 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 09:50:12,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:12,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:50:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433368520] [2020-12-22 09:50:12,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:50:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:50:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:50:12,698 INFO L87 Difference]: Start difference. First operand 11771 states and 15069 transitions. Second operand 24 states. [2020-12-22 09:50:13,214 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:50:13,470 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:13,740 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:13,974 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:50:14,376 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:50:15,116 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:50:15,573 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:50:15,765 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:50:16,098 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:50:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:18,125 INFO L93 Difference]: Finished difference Result 18601 states and 23329 transitions. [2020-12-22 09:50:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:50:18,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:50:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:18,140 INFO L225 Difference]: With dead ends: 18601 [2020-12-22 09:50:18,140 INFO L226 Difference]: Without dead ends: 13706 [2020-12-22 09:50:18,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:50:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-12-22 09:50:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 9679. [2020-12-22 09:50:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9679 states. [2020-12-22 09:50:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 12538 transitions. [2020-12-22 09:50:19,412 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 12538 transitions. Word has length 86 [2020-12-22 09:50:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:19,412 INFO L481 AbstractCegarLoop]: Abstraction has 9679 states and 12538 transitions. [2020-12-22 09:50:19,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:50:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 12538 transitions. [2020-12-22 09:50:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:50:19,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:19,415 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 09:50:19,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:19,617 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:19,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:19,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:50:19,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:19,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133980177] [2020-12-22 09:50:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:19,954 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:50:20,068 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 09:50:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133980177] [2020-12-22 09:50:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729168644] [2020-12-22 09:50:20,068 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 09:50:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:50:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:20,602 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 09:50:20,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:20,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:50:20,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783459945] [2020-12-22 09:50:20,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:50:20,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:50:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:50:20,604 INFO L87 Difference]: Start difference. First operand 9679 states and 12538 transitions. Second operand 15 states. [2020-12-22 09:50:21,458 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:50:21,740 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:21,978 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:50:22,254 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:50:22,406 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:22,557 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:22,785 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:22,929 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:50:23,081 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:50:23,698 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:50:24,225 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:50:24,405 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:24,590 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:50:26,369 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:50:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:27,087 INFO L93 Difference]: Finished difference Result 21560 states and 27204 transitions. [2020-12-22 09:50:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:50:27,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:50:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:27,106 INFO L225 Difference]: With dead ends: 21560 [2020-12-22 09:50:27,107 INFO L226 Difference]: Without dead ends: 14106 [2020-12-22 09:50:27,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:50:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14106 states. [2020-12-22 09:50:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14106 to 13990. [2020-12-22 09:50:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13990 states. [2020-12-22 09:50:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13990 states to 13990 states and 17259 transitions. [2020-12-22 09:50:29,141 INFO L78 Accepts]: Start accepts. Automaton has 13990 states and 17259 transitions. Word has length 135 [2020-12-22 09:50:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:29,141 INFO L481 AbstractCegarLoop]: Abstraction has 13990 states and 17259 transitions. [2020-12-22 09:50:29,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:50:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 13990 states and 17259 transitions. [2020-12-22 09:50:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:50:29,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:29,146 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, 1, 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 09:50:29,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 09:50:29,354 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1278366453, now seen corresponding path program 1 times [2020-12-22 09:50:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:29,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644904392] [2020-12-22 09:50:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:29,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644904392] [2020-12-22 09:50:29,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:29,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52177912] [2020-12-22 09:50:29,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:29,430 INFO L87 Difference]: Start difference. First operand 13990 states and 17259 transitions. Second operand 3 states. [2020-12-22 09:50:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:39,636 INFO L93 Difference]: Finished difference Result 16998 states and 22091 transitions. [2020-12-22 09:50:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:39,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-22 09:50:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:39,651 INFO L225 Difference]: With dead ends: 16998 [2020-12-22 09:50:39,651 INFO L226 Difference]: Without dead ends: 15494 [2020-12-22 09:50:39,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15494 states. [2020-12-22 09:50:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15494 to 15492. [2020-12-22 09:50:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15492 states. [2020-12-22 09:50:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15492 states to 15492 states and 19230 transitions. [2020-12-22 09:50:41,713 INFO L78 Accepts]: Start accepts. Automaton has 15492 states and 19230 transitions. Word has length 135 [2020-12-22 09:50:41,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:41,713 INFO L481 AbstractCegarLoop]: Abstraction has 15492 states and 19230 transitions. [2020-12-22 09:50:41,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 15492 states and 19230 transitions. [2020-12-22 09:50:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:50:41,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:41,717 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 09:50:41,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:50:41,717 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:50:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:41,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087901267] [2020-12-22 09:50:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:42,232 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 09:50:42,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087901267] [2020-12-22 09:50:42,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055845923] [2020-12-22 09:50:42,232 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 09:50:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:50:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:43,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:50:43,268 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:43,473 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:44,104 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:45,051 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:46,332 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:47,882 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:49,306 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:50,287 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:50,707 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:50:51,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:50:52,631 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:51:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:12,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:12,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:51:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110477991] [2020-12-22 09:51:12,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:51:12,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:51:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:51:12,406 INFO L87 Difference]: Start difference. First operand 15492 states and 19230 transitions. Second operand 22 states. [2020-12-22 09:51:12,797 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 09:51:13,464 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-12-22 09:51:14,015 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 09:51:14,600 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-12-22 09:51:15,620 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-12-22 09:51:19,093 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-12-22 09:51:22,256 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 09:51:22,991 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-12-22 09:51:23,628 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-12-22 09:51:24,153 WARN L197 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-22 09:51:24,723 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 09:51:25,852 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2020-12-22 09:51:28,829 WARN L197 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 307 DAG size of output: 302 [2020-12-22 09:51:29,618 WARN L197 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2020-12-22 09:51:33,157 WARN L197 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 304 DAG size of output: 299 [2020-12-22 09:51:36,655 WARN L197 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 321 DAG size of output: 308 [2020-12-22 09:51:43,114 WARN L197 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 310 DAG size of output: 305 [2020-12-22 09:51:43,834 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2020-12-22 09:51:47,301 WARN L197 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 307 DAG size of output: 302 [2020-12-22 09:51:48,090 WARN L197 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 99 [2020-12-22 09:51:56,617 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 301 DAG size of output: 296 [2020-12-22 09:51:57,313 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-22 09:52:00,824 WARN L197 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 307 DAG size of output: 302