/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/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:12:03,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:12:03,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:12:03,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:12:03,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:12:03,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:12:03,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:12:03,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:12:03,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:12:03,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:12:03,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:12:03,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:12:03,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:12:03,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:12:03,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:12:03,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:12:03,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:12:03,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:12:03,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:12:03,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:12:03,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:12:03,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:12:03,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:12:03,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:12:03,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:12:03,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:12:03,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:12:03,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:12:03,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:12:03,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:12:03,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:12:03,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:12:03,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:12:03,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:12:03,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:12:03,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:12:03,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:12:03,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:12:03,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:12:03,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:12:03,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:12:03,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:12:03,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:12:03,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:12:03,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:12:03,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:12:03,789 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:12:03,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:12:03,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:12:03,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:12:03,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:12:03,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:12:03,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:12:03,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:12:03,791 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:12:03,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:12:03,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:12:03,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:12:03,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:12:03,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:12:03,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:12:03,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:12:03,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:12:03,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:12:03,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:12:03,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:12:03,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:12:03,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:12:04,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:12:04,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:12:04,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:12:04,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:12:04,245 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:12:04,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:12:04,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd522a22/6825d723a87d4b4f9d72ded2d578112e/FLAG52b9d6f82 [2020-12-22 09:12:05,104 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:12:05,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:12:05,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd522a22/6825d723a87d4b4f9d72ded2d578112e/FLAG52b9d6f82 [2020-12-22 09:12:05,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd522a22/6825d723a87d4b4f9d72ded2d578112e [2020-12-22 09:12:05,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:12:05,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:12:05,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:12:05,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:12:05,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:12:05,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:12:05" (1/1) ... [2020-12-22 09:12:05,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b6f7d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:05, skipping insertion in model container [2020-12-22 09:12:05,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:12:05" (1/1) ... [2020-12-22 09:12:05,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:12:05,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:12:05,831 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/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[22684,22697] [2020-12-22 09:12:06,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:12:06,125 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:12:06,356 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/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[22684,22697] [2020-12-22 09:12:06,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:12:06,564 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:12:06,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06 WrapperNode [2020-12-22 09:12:06,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:12:06,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:12:06,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:12:06,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:12:06,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:12:06,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:12:06,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:12:06,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:12:06,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (1/1) ... [2020-12-22 09:12:06,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:12:06,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:12:06,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:12:06,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:12:06,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (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 09:12:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:12:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:12:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:12:06,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:12:09,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:12:09,445 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:12:09,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:12:09 BoogieIcfgContainer [2020-12-22 09:12:09,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:12:09,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:12:09,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:12:09,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:12:09,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:12:05" (1/3) ... [2020-12-22 09:12:09,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b77e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:12:09, skipping insertion in model container [2020-12-22 09:12:09,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:12:06" (2/3) ... [2020-12-22 09:12:09,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b77e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:12:09, skipping insertion in model container [2020-12-22 09:12:09,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:12:09" (3/3) ... [2020-12-22 09:12:09,457 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:12:09,464 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:12:09,470 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:12:09,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:12:09,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:12:09,535 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:12:09,536 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:12:09,536 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:12:09,536 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:12:09,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:12:09,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:12:09,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:12:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states. [2020-12-22 09:12:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-12-22 09:12:09,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:09,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:09,616 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash 704391392, now seen corresponding path program 1 times [2020-12-22 09:12:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:09,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343036990] [2020-12-22 09:12:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:10,646 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 09:12:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343036990] [2020-12-22 09:12:10,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:10,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:10,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579845908] [2020-12-22 09:12:10,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:10,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:10,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:10,678 INFO L87 Difference]: Start difference. First operand 780 states. Second operand 3 states. [2020-12-22 09:12:10,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:10,922 INFO L93 Difference]: Finished difference Result 1230 states and 2181 transitions. [2020-12-22 09:12:10,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:10,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2020-12-22 09:12:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:10,970 INFO L225 Difference]: With dead ends: 1230 [2020-12-22 09:12:10,970 INFO L226 Difference]: Without dead ends: 992 [2020-12-22 09:12:10,976 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 09:12:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2020-12-22 09:12:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 989. [2020-12-22 09:12:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 989 states. [2020-12-22 09:12:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1710 transitions. [2020-12-22 09:12:11,123 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1710 transitions. Word has length 213 [2020-12-22 09:12:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:11,125 INFO L481 AbstractCegarLoop]: Abstraction has 989 states and 1710 transitions. [2020-12-22 09:12:11,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1710 transitions. [2020-12-22 09:12:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 09:12:11,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:11,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:11,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:12:11,131 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -446275611, now seen corresponding path program 1 times [2020-12-22 09:12:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473783365] [2020-12-22 09:12:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:11,471 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 09:12:11,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473783365] [2020-12-22 09:12:11,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:11,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:11,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838063630] [2020-12-22 09:12:11,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:11,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:11,480 INFO L87 Difference]: Start difference. First operand 989 states and 1710 transitions. Second operand 3 states. [2020-12-22 09:12:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:11,613 INFO L93 Difference]: Finished difference Result 1847 states and 3150 transitions. [2020-12-22 09:12:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:11,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2020-12-22 09:12:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:11,629 INFO L225 Difference]: With dead ends: 1847 [2020-12-22 09:12:11,630 INFO L226 Difference]: Without dead ends: 1406 [2020-12-22 09:12:11,637 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 09:12:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2020-12-22 09:12:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1402. [2020-12-22 09:12:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1402 states. [2020-12-22 09:12:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2401 transitions. [2020-12-22 09:12:11,720 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2401 transitions. Word has length 217 [2020-12-22 09:12:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:11,721 INFO L481 AbstractCegarLoop]: Abstraction has 1402 states and 2401 transitions. [2020-12-22 09:12:11,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2401 transitions. [2020-12-22 09:12:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 09:12:11,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:11,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:11,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:12:11,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 752945258, now seen corresponding path program 1 times [2020-12-22 09:12:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:11,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489807513] [2020-12-22 09:12:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:12,001 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 09:12:12,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489807513] [2020-12-22 09:12:12,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:12,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:12,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154281334] [2020-12-22 09:12:12,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:12,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:12,010 INFO L87 Difference]: Start difference. First operand 1402 states and 2401 transitions. Second operand 3 states. [2020-12-22 09:12:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:12,129 INFO L93 Difference]: Finished difference Result 3062 states and 5179 transitions. [2020-12-22 09:12:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:12,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 09:12:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:12,143 INFO L225 Difference]: With dead ends: 3062 [2020-12-22 09:12:12,144 INFO L226 Difference]: Without dead ends: 2208 [2020-12-22 09:12:12,148 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 09:12:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2020-12-22 09:12:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2202. [2020-12-22 09:12:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2020-12-22 09:12:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 3733 transitions. [2020-12-22 09:12:12,261 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 3733 transitions. Word has length 221 [2020-12-22 09:12:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:12,268 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 3733 transitions. [2020-12-22 09:12:12,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 3733 transitions. [2020-12-22 09:12:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 09:12:12,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:12,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:12,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:12:12,276 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash 977576431, now seen corresponding path program 1 times [2020-12-22 09:12:12,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:12,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316524474] [2020-12-22 09:12:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:12,579 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 09:12:12,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316524474] [2020-12-22 09:12:12,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:12,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601569682] [2020-12-22 09:12:12,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:12,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:12,583 INFO L87 Difference]: Start difference. First operand 2202 states and 3733 transitions. Second operand 3 states. [2020-12-22 09:12:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:12,776 INFO L93 Difference]: Finished difference Result 5414 states and 9087 transitions. [2020-12-22 09:12:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:12,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2020-12-22 09:12:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:12,798 INFO L225 Difference]: With dead ends: 5414 [2020-12-22 09:12:12,798 INFO L226 Difference]: Without dead ends: 3760 [2020-12-22 09:12:12,803 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 09:12:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2020-12-22 09:12:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3750. [2020-12-22 09:12:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3750 states. [2020-12-22 09:12:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 6297 transitions. [2020-12-22 09:12:12,999 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 6297 transitions. Word has length 225 [2020-12-22 09:12:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:13,000 INFO L481 AbstractCegarLoop]: Abstraction has 3750 states and 6297 transitions. [2020-12-22 09:12:13,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 6297 transitions. [2020-12-22 09:12:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 09:12:13,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:13,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:13,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:12:13,007 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash 943025140, now seen corresponding path program 1 times [2020-12-22 09:12:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:13,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35397961] [2020-12-22 09:12:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:13,305 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 09:12:13,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35397961] [2020-12-22 09:12:13,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:13,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074920024] [2020-12-22 09:12:13,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:13,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:13,308 INFO L87 Difference]: Start difference. First operand 3750 states and 6297 transitions. Second operand 3 states. [2020-12-22 09:12:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:13,653 INFO L93 Difference]: Finished difference Result 9962 states and 16603 transitions. [2020-12-22 09:12:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:13,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 09:12:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:13,687 INFO L225 Difference]: With dead ends: 9962 [2020-12-22 09:12:13,687 INFO L226 Difference]: Without dead ends: 6760 [2020-12-22 09:12:13,693 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 09:12:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2020-12-22 09:12:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6742. [2020-12-22 09:12:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6742 states. [2020-12-22 09:12:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 11225 transitions. [2020-12-22 09:12:14,062 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 11225 transitions. Word has length 229 [2020-12-22 09:12:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:14,062 INFO L481 AbstractCegarLoop]: Abstraction has 6742 states and 11225 transitions. [2020-12-22 09:12:14,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 11225 transitions. [2020-12-22 09:12:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 09:12:14,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:14,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:14,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:12:14,070 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash -907844103, now seen corresponding path program 1 times [2020-12-22 09:12:14,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:14,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897503733] [2020-12-22 09:12:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:14,441 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 09:12:14,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897503733] [2020-12-22 09:12:14,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:14,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:12:14,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231872824] [2020-12-22 09:12:14,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:12:14,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:12:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:12:14,444 INFO L87 Difference]: Start difference. First operand 6742 states and 11225 transitions. Second operand 7 states. [2020-12-22 09:12:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:16,977 INFO L93 Difference]: Finished difference Result 41320 states and 68796 transitions. [2020-12-22 09:12:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:12:16,978 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 233 [2020-12-22 09:12:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:17,092 INFO L225 Difference]: With dead ends: 41320 [2020-12-22 09:12:17,092 INFO L226 Difference]: Without dead ends: 35126 [2020-12-22 09:12:17,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:12:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35126 states. [2020-12-22 09:12:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35126 to 12774. [2020-12-22 09:12:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12774 states. [2020-12-22 09:12:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12774 states to 12774 states and 21179 transitions. [2020-12-22 09:12:18,298 INFO L78 Accepts]: Start accepts. Automaton has 12774 states and 21179 transitions. Word has length 233 [2020-12-22 09:12:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:18,298 INFO L481 AbstractCegarLoop]: Abstraction has 12774 states and 21179 transitions. [2020-12-22 09:12:18,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:12:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12774 states and 21179 transitions. [2020-12-22 09:12:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 09:12:18,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:18,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:18,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:12:18,308 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1849984177, now seen corresponding path program 1 times [2020-12-22 09:12:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:18,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228946699] [2020-12-22 09:12:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:18,613 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 09:12:18,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228946699] [2020-12-22 09:12:18,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:18,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:12:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43667025] [2020-12-22 09:12:18,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:12:18,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:12:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:12:18,615 INFO L87 Difference]: Start difference. First operand 12774 states and 21179 transitions. Second operand 4 states. [2020-12-22 09:12:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:20,119 INFO L93 Difference]: Finished difference Result 34302 states and 56962 transitions. [2020-12-22 09:12:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:12:20,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 09:12:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:20,186 INFO L225 Difference]: With dead ends: 34302 [2020-12-22 09:12:20,187 INFO L226 Difference]: Without dead ends: 22076 [2020-12-22 09:12:20,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:12:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2020-12-22 09:12:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 19000. [2020-12-22 09:12:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19000 states. [2020-12-22 09:12:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19000 states to 19000 states and 31520 transitions. [2020-12-22 09:12:21,299 INFO L78 Accepts]: Start accepts. Automaton has 19000 states and 31520 transitions. Word has length 234 [2020-12-22 09:12:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:21,300 INFO L481 AbstractCegarLoop]: Abstraction has 19000 states and 31520 transitions. [2020-12-22 09:12:21,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:12:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 19000 states and 31520 transitions. [2020-12-22 09:12:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 09:12:21,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:21,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:21,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:12:21,312 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1447872960, now seen corresponding path program 1 times [2020-12-22 09:12:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:21,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350745890] [2020-12-22 09:12:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:21,487 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 09:12:21,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350745890] [2020-12-22 09:12:21,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:21,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:12:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939355788] [2020-12-22 09:12:21,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:12:21,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:12:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:12:21,489 INFO L87 Difference]: Start difference. First operand 19000 states and 31520 transitions. Second operand 4 states. [2020-12-22 09:12:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:23,108 INFO L93 Difference]: Finished difference Result 51292 states and 85136 transitions. [2020-12-22 09:12:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:12:23,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 09:12:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:23,193 INFO L225 Difference]: With dead ends: 51292 [2020-12-22 09:12:23,193 INFO L226 Difference]: Without dead ends: 32840 [2020-12-22 09:12:23,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:12:23,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32840 states. [2020-12-22 09:12:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32840 to 28298. [2020-12-22 09:12:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28298 states. [2020-12-22 09:12:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28298 states to 28298 states and 46893 transitions. [2020-12-22 09:12:25,157 INFO L78 Accepts]: Start accepts. Automaton has 28298 states and 46893 transitions. Word has length 235 [2020-12-22 09:12:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 28298 states and 46893 transitions. [2020-12-22 09:12:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:12:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 28298 states and 46893 transitions. [2020-12-22 09:12:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 09:12:25,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:25,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:25,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:12:25,173 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1871885144, now seen corresponding path program 1 times [2020-12-22 09:12:25,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:25,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688869403] [2020-12-22 09:12:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:25,348 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 09:12:25,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688869403] [2020-12-22 09:12:25,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:25,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:12:25,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374980593] [2020-12-22 09:12:25,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:12:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:25,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:12:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:12:25,351 INFO L87 Difference]: Start difference. First operand 28298 states and 46893 transitions. Second operand 4 states. [2020-12-22 09:12:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:27,965 INFO L93 Difference]: Finished difference Result 76596 states and 127048 transitions. [2020-12-22 09:12:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:12:27,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 09:12:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:28,059 INFO L225 Difference]: With dead ends: 76596 [2020-12-22 09:12:28,059 INFO L226 Difference]: Without dead ends: 48846 [2020-12-22 09:12:28,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:12:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48846 states. [2020-12-22 09:12:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48846 to 42174. [2020-12-22 09:12:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42174 states. [2020-12-22 09:12:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42174 states to 42174 states and 69825 transitions. [2020-12-22 09:12:30,831 INFO L78 Accepts]: Start accepts. Automaton has 42174 states and 69825 transitions. Word has length 236 [2020-12-22 09:12:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:30,832 INFO L481 AbstractCegarLoop]: Abstraction has 42174 states and 69825 transitions. [2020-12-22 09:12:30,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:12:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42174 states and 69825 transitions. [2020-12-22 09:12:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 09:12:30,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:30,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:30,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:12:30,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1786556042, now seen corresponding path program 1 times [2020-12-22 09:12:30,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:30,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684224941] [2020-12-22 09:12:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:31,017 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 09:12:31,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684224941] [2020-12-22 09:12:31,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:31,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:31,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54107021] [2020-12-22 09:12:31,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:31,020 INFO L87 Difference]: Start difference. First operand 42174 states and 69825 transitions. Second operand 3 states. [2020-12-22 09:12:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:34,263 INFO L93 Difference]: Finished difference Result 94034 states and 155692 transitions. [2020-12-22 09:12:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:34,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 09:12:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:34,362 INFO L225 Difference]: With dead ends: 94034 [2020-12-22 09:12:34,362 INFO L226 Difference]: Without dead ends: 65454 [2020-12-22 09:12:34,394 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 09:12:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65454 states. [2020-12-22 09:12:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65454 to 65452. [2020-12-22 09:12:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65452 states. [2020-12-22 09:12:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65452 states to 65452 states and 108102 transitions. [2020-12-22 09:12:38,196 INFO L78 Accepts]: Start accepts. Automaton has 65452 states and 108102 transitions. Word has length 237 [2020-12-22 09:12:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:38,197 INFO L481 AbstractCegarLoop]: Abstraction has 65452 states and 108102 transitions. [2020-12-22 09:12:38,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 65452 states and 108102 transitions. [2020-12-22 09:12:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 09:12:38,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:38,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:38,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:12:38,206 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -556771244, now seen corresponding path program 1 times [2020-12-22 09:12:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:38,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433725695] [2020-12-22 09:12:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:38,364 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 09:12:38,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433725695] [2020-12-22 09:12:38,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:38,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:38,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466790488] [2020-12-22 09:12:38,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:38,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:38,367 INFO L87 Difference]: Start difference. First operand 65452 states and 108102 transitions. Second operand 3 states. [2020-12-22 09:12:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:42,878 INFO L93 Difference]: Finished difference Result 127674 states and 211012 transitions. [2020-12-22 09:12:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:42,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 09:12:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:43,013 INFO L225 Difference]: With dead ends: 127674 [2020-12-22 09:12:43,014 INFO L226 Difference]: Without dead ends: 93152 [2020-12-22 09:12:43,064 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 09:12:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93152 states. [2020-12-22 09:12:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93152 to 93150. [2020-12-22 09:12:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93150 states. [2020-12-22 09:12:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93150 states to 93150 states and 153550 transitions. [2020-12-22 09:12:48,203 INFO L78 Accepts]: Start accepts. Automaton has 93150 states and 153550 transitions. Word has length 237 [2020-12-22 09:12:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:12:48,204 INFO L481 AbstractCegarLoop]: Abstraction has 93150 states and 153550 transitions. [2020-12-22 09:12:48,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:12:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 93150 states and 153550 transitions. [2020-12-22 09:12:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 09:12:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:12:48,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:48,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:12:48,210 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:12:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:12:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1982651058, now seen corresponding path program 1 times [2020-12-22 09:12:48,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:12:48,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909748306] [2020-12-22 09:12:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:12:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:12:48,378 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 09:12:48,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909748306] [2020-12-22 09:12:48,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:12:48,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:12:48,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142293898] [2020-12-22 09:12:48,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:12:48,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:12:48,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:12:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:12:48,381 INFO L87 Difference]: Start difference. First operand 93150 states and 153550 transitions. Second operand 3 states. [2020-12-22 09:12:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:12:55,222 INFO L93 Difference]: Finished difference Result 180248 states and 297422 transitions. [2020-12-22 09:12:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:12:55,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 09:12:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:12:55,578 INFO L225 Difference]: With dead ends: 180248 [2020-12-22 09:12:55,578 INFO L226 Difference]: Without dead ends: 131488 [2020-12-22 09:12:55,638 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 09:12:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131488 states. [2020-12-22 09:13:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131488 to 131486. [2020-12-22 09:13:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131486 states. [2020-12-22 09:13:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131486 states to 131486 states and 216329 transitions. [2020-12-22 09:13:02,656 INFO L78 Accepts]: Start accepts. Automaton has 131486 states and 216329 transitions. Word has length 237 [2020-12-22 09:13:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:13:02,656 INFO L481 AbstractCegarLoop]: Abstraction has 131486 states and 216329 transitions. [2020-12-22 09:13:02,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:13:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 131486 states and 216329 transitions. [2020-12-22 09:13:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 09:13:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:13:02,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:02,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:13:02,662 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:13:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:13:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2135918983, now seen corresponding path program 1 times [2020-12-22 09:13:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:13:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394096228] [2020-12-22 09:13:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:13:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:13:03,209 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 09:13:03,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394096228] [2020-12-22 09:13:03,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:13:03,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:13:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053207543] [2020-12-22 09:13:03,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:13:03,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:13:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:13:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:13:03,213 INFO L87 Difference]: Start difference. First operand 131486 states and 216329 transitions. Second operand 4 states. [2020-12-22 09:13:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:13:16,629 INFO L93 Difference]: Finished difference Result 387566 states and 638462 transitions. [2020-12-22 09:13:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:13:16,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 09:13:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:13:17,115 INFO L225 Difference]: With dead ends: 387566 [2020-12-22 09:13:17,115 INFO L226 Difference]: Without dead ends: 257658 [2020-12-22 09:13:17,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:13:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257658 states. [2020-12-22 09:13:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257658 to 214052. [2020-12-22 09:13:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214052 states. [2020-12-22 09:13:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214052 states to 214052 states and 351719 transitions. [2020-12-22 09:13:29,908 INFO L78 Accepts]: Start accepts. Automaton has 214052 states and 351719 transitions. Word has length 237 [2020-12-22 09:13:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:13:29,908 INFO L481 AbstractCegarLoop]: Abstraction has 214052 states and 351719 transitions. [2020-12-22 09:13:29,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:13:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 214052 states and 351719 transitions. [2020-12-22 09:13:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 09:13:29,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:13:29,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:29,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:13:29,914 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:13:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:13:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash 561825304, now seen corresponding path program 1 times [2020-12-22 09:13:29,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:13:29,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639395850] [2020-12-22 09:13:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:13:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:13:30,098 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 09:13:30,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639395850] [2020-12-22 09:13:30,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:13:30,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:13:30,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513028223] [2020-12-22 09:13:30,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:13:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:13:30,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:13:30,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:13:30,101 INFO L87 Difference]: Start difference. First operand 214052 states and 351719 transitions. Second operand 3 states. [2020-12-22 09:13:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:13:48,435 INFO L93 Difference]: Finished difference Result 471744 states and 775567 transitions. [2020-12-22 09:13:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:13:48,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2020-12-22 09:13:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:13:49,109 INFO L225 Difference]: With dead ends: 471744 [2020-12-22 09:13:49,110 INFO L226 Difference]: Without dead ends: 324832 [2020-12-22 09:13:49,261 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 09:13:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324832 states. [2020-12-22 09:14:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324832 to 324830. [2020-12-22 09:14:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324830 states.