./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label23.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6a3c97d212c5da9fd8322cf568d9e152410da494dc81afa8e10ab2614b0e804 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 13:15:04,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 13:15:04,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 13:15:04,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 13:15:04,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 13:15:04,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 13:15:04,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 13:15:04,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 13:15:04,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 13:15:04,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 13:15:04,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 13:15:04,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 13:15:04,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 13:15:04,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 13:15:04,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 13:15:04,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 13:15:04,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 13:15:04,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 13:15:04,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 13:15:04,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 13:15:04,830 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 13:15:04,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 13:15:04,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 13:15:04,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 13:15:04,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 13:15:04,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 13:15:04,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 13:15:04,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 13:15:04,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 13:15:04,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 13:15:04,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 13:15:04,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 13:15:04,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 13:15:04,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 13:15:04,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 13:15:04,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 13:15:04,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 13:15:04,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 13:15:04,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 13:15:04,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 13:15:04,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 13:15:04,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 13:15:04,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 13:15:04,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 13:15:04,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 13:15:04,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 13:15:04,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 13:15:04,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 13:15:04,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 13:15:04,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 13:15:04,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 13:15:04,867 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 13:15:04,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 13:15:04,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 13:15:04,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 13:15:04,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:15:04,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 13:15:04,870 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 13:15:04,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 13:15:04,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 13:15:04,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6a3c97d212c5da9fd8322cf568d9e152410da494dc81afa8e10ab2614b0e804 [2022-07-13 13:15:04,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 13:15:05,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 13:15:05,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 13:15:05,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 13:15:05,015 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 13:15:05,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2022-07-13 13:15:05,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51ad5352c/5311221740794aa4a9bb1c9993eebe02/FLAG5c9210fe2 [2022-07-13 13:15:05,587 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 13:15:05,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2022-07-13 13:15:05,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51ad5352c/5311221740794aa4a9bb1c9993eebe02/FLAG5c9210fe2 [2022-07-13 13:15:06,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51ad5352c/5311221740794aa4a9bb1c9993eebe02 [2022-07-13 13:15:06,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 13:15:06,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 13:15:06,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 13:15:06,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 13:15:06,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 13:15:06,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:06,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3204deed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06, skipping insertion in model container [2022-07-13 13:15:06,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:06,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 13:15:06,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 13:15:06,369 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label23.c[3293,3306] [2022-07-13 13:15:06,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:15:06,739 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 13:15:06,759 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label23.c[3293,3306] [2022-07-13 13:15:06,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 13:15:06,986 INFO L208 MainTranslator]: Completed translation [2022-07-13 13:15:06,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06 WrapperNode [2022-07-13 13:15:06,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 13:15:06,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 13:15:06,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 13:15:06,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 13:15:06,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,252 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-13 13:15:07,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 13:15:07,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 13:15:07,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 13:15:07,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 13:15:07,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 13:15:07,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 13:15:07,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 13:15:07,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 13:15:07,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (1/1) ... [2022-07-13 13:15:07,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 13:15:07,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:07,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 13:15:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 13:15:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 13:15:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 13:15:07,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 13:15:07,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 13:15:07,578 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 13:15:07,579 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 13:15:09,791 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 13:15:09,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 13:15:09,799 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 13:15:09,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:15:09 BoogieIcfgContainer [2022-07-13 13:15:09,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 13:15:09,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 13:15:09,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 13:15:09,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 13:15:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 01:15:06" (1/3) ... [2022-07-13 13:15:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3136853b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:15:09, skipping insertion in model container [2022-07-13 13:15:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 01:15:06" (2/3) ... [2022-07-13 13:15:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3136853b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 01:15:09, skipping insertion in model container [2022-07-13 13:15:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 01:15:09" (3/3) ... [2022-07-13 13:15:09,807 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label23.c [2022-07-13 13:15:09,816 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 13:15:09,816 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 13:15:09,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 13:15:09,858 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b5313b7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@56d07783 [2022-07-13 13:15:09,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 13:15:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 13:15:09,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:09,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:09,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash -85512855, now seen corresponding path program 1 times [2022-07-13 13:15:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275495847] [2022-07-13 13:15:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:09,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:10,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:10,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275495847] [2022-07-13 13:15:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275495847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:10,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:10,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394615883] [2022-07-13 13:15:10,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:10,087 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:12,360 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-13 13:15:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:12,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-13 13:15:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:12,401 INFO L225 Difference]: With dead ends: 1642 [2022-07-13 13:15:12,404 INFO L226 Difference]: Without dead ends: 975 [2022-07-13 13:15:12,412 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:12,414 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 469 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:12,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:15:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-13 13:15:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-13 13:15:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-13 13:15:12,511 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 21 [2022-07-13 13:15:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:12,511 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-13 13:15:12,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-13 13:15:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 13:15:12,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:12,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:12,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 13:15:12,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash 637490300, now seen corresponding path program 1 times [2022-07-13 13:15:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:12,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725712278] [2022-07-13 13:15:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:12,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:12,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725712278] [2022-07-13 13:15:12,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725712278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:12,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:12,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439422772] [2022-07-13 13:15:12,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:12,620 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:14,178 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-13 13:15:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-13 13:15:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:14,184 INFO L225 Difference]: With dead ends: 2814 [2022-07-13 13:15:14,184 INFO L226 Difference]: Without dead ends: 1844 [2022-07-13 13:15:14,185 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:14,186 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 470 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:14,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-13 13:15:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-13 13:15:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-13 13:15:14,246 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 91 [2022-07-13 13:15:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:14,247 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-13 13:15:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-13 13:15:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 13:15:14,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:14,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 13:15:14,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash 873597241, now seen corresponding path program 1 times [2022-07-13 13:15:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:14,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864290521] [2022-07-13 13:15:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:14,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864290521] [2022-07-13 13:15:14,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864290521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:14,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:14,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:15:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088846973] [2022-07-13 13:15:14,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:14,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:14,447 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:16,101 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-13 13:15:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-13 13:15:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:16,110 INFO L225 Difference]: With dead ends: 5395 [2022-07-13 13:15:16,110 INFO L226 Difference]: Without dead ends: 2701 [2022-07-13 13:15:16,112 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:16,117 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:16,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-13 13:15:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-13 13:15:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-13 13:15:16,149 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 113 [2022-07-13 13:15:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:16,150 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-13 13:15:16,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-13 13:15:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-13 13:15:16,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:16,157 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 13:15:16,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1388407930, now seen corresponding path program 1 times [2022-07-13 13:15:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:16,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105251029] [2022-07-13 13:15:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:16,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105251029] [2022-07-13 13:15:16,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105251029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:16,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:16,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069304262] [2022-07-13 13:15:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:16,312 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:17,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:17,718 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-13 13:15:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-13 13:15:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:17,745 INFO L225 Difference]: With dead ends: 7108 [2022-07-13 13:15:17,759 INFO L226 Difference]: Without dead ends: 4409 [2022-07-13 13:15:17,763 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:17,772 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:17,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:15:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-13 13:15:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-13 13:15:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-13 13:15:17,882 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 173 [2022-07-13 13:15:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:17,883 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-13 13:15:17,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-13 13:15:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-13 13:15:17,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:17,884 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:17,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 13:15:17,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1455471595, now seen corresponding path program 1 times [2022-07-13 13:15:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:17,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144129246] [2022-07-13 13:15:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 13:15:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144129246] [2022-07-13 13:15:18,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144129246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:18,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:18,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653096666] [2022-07-13 13:15:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:18,031 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:19,529 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-13 13:15:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2022-07-13 13:15:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:19,544 INFO L225 Difference]: With dead ends: 10936 [2022-07-13 13:15:19,544 INFO L226 Difference]: Without dead ends: 6528 [2022-07-13 13:15:19,549 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:19,549 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 430 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:19,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:15:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-13 13:15:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-13 13:15:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-13 13:15:19,613 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 175 [2022-07-13 13:15:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:19,613 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-13 13:15:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-13 13:15:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-13 13:15:19,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:19,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:19,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 13:15:19,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:19,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1465351909, now seen corresponding path program 1 times [2022-07-13 13:15:19,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:19,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940582660] [2022-07-13 13:15:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:19,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940582660] [2022-07-13 13:15:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940582660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:19,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:19,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658161508] [2022-07-13 13:15:19,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:19,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:19,718 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:21,191 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-07-13 13:15:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2022-07-13 13:15:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:21,204 INFO L225 Difference]: With dead ends: 10045 [2022-07-13 13:15:21,205 INFO L226 Difference]: Without dead ends: 5665 [2022-07-13 13:15:21,208 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:21,209 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 415 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:21,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:15:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-07-13 13:15:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-07-13 13:15:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-07-13 13:15:21,268 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 241 [2022-07-13 13:15:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:21,269 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-07-13 13:15:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-07-13 13:15:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-13 13:15:21,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:21,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:21,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 13:15:21,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1091256905, now seen corresponding path program 1 times [2022-07-13 13:15:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:21,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277332694] [2022-07-13 13:15:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:21,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 13:15:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:21,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277332694] [2022-07-13 13:15:21,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277332694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:21,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:21,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863278412] [2022-07-13 13:15:21,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:21,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:21,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:21,365 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:22,896 INFO L93 Difference]: Finished difference Result 12593 states and 14783 transitions. [2022-07-13 13:15:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-07-13 13:15:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:22,913 INFO L225 Difference]: With dead ends: 12593 [2022-07-13 13:15:22,913 INFO L226 Difference]: Without dead ends: 6936 [2022-07-13 13:15:22,918 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:22,919 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:22,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2022-07-13 13:15:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6936. [2022-07-13 13:15:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 1.1322278298485942) internal successors, (7852), 6935 states have internal predecessors, (7852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 7852 transitions. [2022-07-13 13:15:23,026 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 7852 transitions. Word has length 253 [2022-07-13 13:15:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:23,027 INFO L495 AbstractCegarLoop]: Abstraction has 6936 states and 7852 transitions. [2022-07-13 13:15:23,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 7852 transitions. [2022-07-13 13:15:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-13 13:15:23,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:23,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 13:15:23,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 13:15:23,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1232583844, now seen corresponding path program 1 times [2022-07-13 13:15:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130266566] [2022-07-13 13:15:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-13 13:15:23,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:23,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130266566] [2022-07-13 13:15:23,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130266566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:23,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:23,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334319744] [2022-07-13 13:15:23,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:23,149 INFO L87 Difference]: Start difference. First operand 6936 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:24,703 INFO L93 Difference]: Finished difference Result 16424 states and 18762 transitions. [2022-07-13 13:15:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:24,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2022-07-13 13:15:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:24,717 INFO L225 Difference]: With dead ends: 16424 [2022-07-13 13:15:24,717 INFO L226 Difference]: Without dead ends: 9490 [2022-07-13 13:15:24,723 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:24,724 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 484 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:24,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 13:15:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2022-07-13 13:15:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 8636. [2022-07-13 13:15:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8636 states, 8635 states have (on average 1.1345686160972785) internal successors, (9797), 8635 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 9797 transitions. [2022-07-13 13:15:24,852 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 9797 transitions. Word has length 293 [2022-07-13 13:15:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:24,853 INFO L495 AbstractCegarLoop]: Abstraction has 8636 states and 9797 transitions. [2022-07-13 13:15:24,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 9797 transitions. [2022-07-13 13:15:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-13 13:15:24,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:24,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 13:15:24,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1429827616, now seen corresponding path program 1 times [2022-07-13 13:15:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950976060] [2022-07-13 13:15:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:24,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:24,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:24,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950976060] [2022-07-13 13:15:24,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950976060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:24,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:24,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:24,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017889581] [2022-07-13 13:15:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:24,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:24,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:24,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:24,956 INFO L87 Difference]: Start difference. First operand 8636 states and 9797 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:26,618 INFO L93 Difference]: Finished difference Result 23689 states and 26990 transitions. [2022-07-13 13:15:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2022-07-13 13:15:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:26,640 INFO L225 Difference]: With dead ends: 23689 [2022-07-13 13:15:26,641 INFO L226 Difference]: Without dead ends: 15055 [2022-07-13 13:15:26,651 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:26,653 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 480 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:26,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 807 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15055 states. [2022-07-13 13:15:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15055 to 14182. [2022-07-13 13:15:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 1.130315210492913) internal successors, (16029), 14181 states have internal predecessors, (16029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 16029 transitions. [2022-07-13 13:15:26,869 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 16029 transitions. Word has length 310 [2022-07-13 13:15:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:26,872 INFO L495 AbstractCegarLoop]: Abstraction has 14182 states and 16029 transitions. [2022-07-13 13:15:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 16029 transitions. [2022-07-13 13:15:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-07-13 13:15:26,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:26,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 13:15:26,878 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1182313876, now seen corresponding path program 1 times [2022-07-13 13:15:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847413032] [2022-07-13 13:15:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 13:15:27,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:27,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847413032] [2022-07-13 13:15:27,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847413032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:27,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:27,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350055658] [2022-07-13 13:15:27,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:27,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:27,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:27,004 INFO L87 Difference]: Start difference. First operand 14182 states and 16029 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:29,319 INFO L93 Difference]: Finished difference Result 34771 states and 39275 transitions. [2022-07-13 13:15:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 360 [2022-07-13 13:15:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:29,347 INFO L225 Difference]: With dead ends: 34771 [2022-07-13 13:15:29,347 INFO L226 Difference]: Without dead ends: 20166 [2022-07-13 13:15:29,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:29,362 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 650 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:29,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 244 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-13 13:15:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20166 states. [2022-07-13 13:15:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20166 to 20164. [2022-07-13 13:15:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1312304716560035) internal successors, (22809), 20163 states have internal predecessors, (22809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22809 transitions. [2022-07-13 13:15:29,625 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22809 transitions. Word has length 360 [2022-07-13 13:15:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:29,625 INFO L495 AbstractCegarLoop]: Abstraction has 20164 states and 22809 transitions. [2022-07-13 13:15:29,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22809 transitions. [2022-07-13 13:15:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-07-13 13:15:29,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:29,633 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:29,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 13:15:29,634 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1187546287, now seen corresponding path program 1 times [2022-07-13 13:15:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456087753] [2022-07-13 13:15:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456087753] [2022-07-13 13:15:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456087753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:29,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:29,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078736312] [2022-07-13 13:15:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:29,834 INFO L87 Difference]: Start difference. First operand 20164 states and 22809 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:31,690 INFO L93 Difference]: Finished difference Result 45882 states and 51904 transitions. [2022-07-13 13:15:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 381 [2022-07-13 13:15:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:31,714 INFO L225 Difference]: With dead ends: 45882 [2022-07-13 13:15:31,715 INFO L226 Difference]: Without dead ends: 25720 [2022-07-13 13:15:31,726 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:31,727 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 416 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:31,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 765 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 13:15:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25720 states. [2022-07-13 13:15:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25720 to 20153. [2022-07-13 13:15:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20153 states, 20152 states have (on average 1.1310539896784437) internal successors, (22793), 20152 states have internal predecessors, (22793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20153 states to 20153 states and 22793 transitions. [2022-07-13 13:15:31,938 INFO L78 Accepts]: Start accepts. Automaton has 20153 states and 22793 transitions. Word has length 381 [2022-07-13 13:15:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:31,938 INFO L495 AbstractCegarLoop]: Abstraction has 20153 states and 22793 transitions. [2022-07-13 13:15:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 20153 states and 22793 transitions. [2022-07-13 13:15:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-13 13:15:31,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:31,948 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 13:15:31,949 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1815556042, now seen corresponding path program 1 times [2022-07-13 13:15:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153168691] [2022-07-13 13:15:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 13:15:32,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153168691] [2022-07-13 13:15:32,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153168691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:32,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:32,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844380747] [2022-07-13 13:15:32,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:32,037 INFO L87 Difference]: Start difference. First operand 20153 states and 22793 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:33,723 INFO L93 Difference]: Finished difference Result 48404 states and 54963 transitions. [2022-07-13 13:15:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-07-13 13:15:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:33,766 INFO L225 Difference]: With dead ends: 48404 [2022-07-13 13:15:33,767 INFO L226 Difference]: Without dead ends: 28253 [2022-07-13 13:15:33,782 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:33,782 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 506 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:33,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 252 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28253 states. [2022-07-13 13:15:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28253 to 28236. [2022-07-13 13:15:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28236 states, 28235 states have (on average 1.1271117407472995) internal successors, (31824), 28235 states have internal predecessors, (31824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28236 states to 28236 states and 31824 transitions. [2022-07-13 13:15:34,243 INFO L78 Accepts]: Start accepts. Automaton has 28236 states and 31824 transitions. Word has length 382 [2022-07-13 13:15:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:34,244 INFO L495 AbstractCegarLoop]: Abstraction has 28236 states and 31824 transitions. [2022-07-13 13:15:34,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28236 states and 31824 transitions. [2022-07-13 13:15:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-07-13 13:15:34,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:34,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:34,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 13:15:34,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash -782379493, now seen corresponding path program 1 times [2022-07-13 13:15:34,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132503163] [2022-07-13 13:15:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 182 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132503163] [2022-07-13 13:15:34,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132503163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620502066] [2022-07-13 13:15:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:34,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:15:34,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 13:15:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 13:15:34,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 182 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:34,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:35,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620502066] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:35,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 13:15:35,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-13 13:15:35,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965780360] [2022-07-13 13:15:35,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:35,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:35,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:35,293 INFO L87 Difference]: Start difference. First operand 28236 states and 31824 transitions. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:38,290 INFO L93 Difference]: Finished difference Result 78207 states and 87757 transitions. [2022-07-13 13:15:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2022-07-13 13:15:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:38,341 INFO L225 Difference]: With dead ends: 78207 [2022-07-13 13:15:38,342 INFO L226 Difference]: Without dead ends: 48267 [2022-07-13 13:15:38,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 773 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 13:15:38,370 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 724 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:38,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 208 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2353 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-13 13:15:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48267 states. [2022-07-13 13:15:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48267 to 44010. [2022-07-13 13:15:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44010 states, 44009 states have (on average 1.1212933718103115) internal successors, (49347), 44009 states have internal predecessors, (49347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44010 states to 44010 states and 49347 transitions. [2022-07-13 13:15:38,926 INFO L78 Accepts]: Start accepts. Automaton has 44010 states and 49347 transitions. Word has length 389 [2022-07-13 13:15:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:38,926 INFO L495 AbstractCegarLoop]: Abstraction has 44010 states and 49347 transitions. [2022-07-13 13:15:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 44010 states and 49347 transitions. [2022-07-13 13:15:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-07-13 13:15:38,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:38,934 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:38,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 13:15:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 13:15:39,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1853110820, now seen corresponding path program 1 times [2022-07-13 13:15:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562074805] [2022-07-13 13:15:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-13 13:15:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:39,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562074805] [2022-07-13 13:15:39,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562074805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:39,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:39,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336859398] [2022-07-13 13:15:39,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:39,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:39,297 INFO L87 Difference]: Start difference. First operand 44010 states and 49347 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:41,163 INFO L93 Difference]: Finished difference Result 102049 states and 114541 transitions. [2022-07-13 13:15:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2022-07-13 13:15:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:41,223 INFO L225 Difference]: With dead ends: 102049 [2022-07-13 13:15:41,224 INFO L226 Difference]: Without dead ends: 51647 [2022-07-13 13:15:41,255 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:41,256 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 499 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:41,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 735 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 13:15:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51647 states. [2022-07-13 13:15:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51647 to 51641. [2022-07-13 13:15:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51641 states, 51640 states have (on average 1.1066421378776143) internal successors, (57147), 51640 states have internal predecessors, (57147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51641 states to 51641 states and 57147 transitions. [2022-07-13 13:15:42,014 INFO L78 Accepts]: Start accepts. Automaton has 51641 states and 57147 transitions. Word has length 425 [2022-07-13 13:15:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:42,015 INFO L495 AbstractCegarLoop]: Abstraction has 51641 states and 57147 transitions. [2022-07-13 13:15:42,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51641 states and 57147 transitions. [2022-07-13 13:15:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-07-13 13:15:42,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:42,022 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 13:15:42,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1846343728, now seen corresponding path program 1 times [2022-07-13 13:15:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:42,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094859133] [2022-07-13 13:15:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:42,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094859133] [2022-07-13 13:15:42,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094859133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:42,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:42,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:15:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970592913] [2022-07-13 13:15:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:42,205 INFO L87 Difference]: Start difference. First operand 51641 states and 57147 transitions. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:44,965 INFO L93 Difference]: Finished difference Result 132682 states and 146542 transitions. [2022-07-13 13:15:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:15:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 427 [2022-07-13 13:15:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:45,098 INFO L225 Difference]: With dead ends: 132682 [2022-07-13 13:15:45,098 INFO L226 Difference]: Without dead ends: 81043 [2022-07-13 13:15:45,141 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:45,142 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 771 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:45,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 165 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:15:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81043 states. [2022-07-13 13:15:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 77208. [2022-07-13 13:15:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77208 states, 77207 states have (on average 1.0991619930835288) internal successors, (84863), 77207 states have internal predecessors, (84863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77208 states to 77208 states and 84863 transitions. [2022-07-13 13:15:46,067 INFO L78 Accepts]: Start accepts. Automaton has 77208 states and 84863 transitions. Word has length 427 [2022-07-13 13:15:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:46,068 INFO L495 AbstractCegarLoop]: Abstraction has 77208 states and 84863 transitions. [2022-07-13 13:15:46,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 77208 states and 84863 transitions. [2022-07-13 13:15:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-13 13:15:46,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:46,076 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 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] [2022-07-13 13:15:46,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 13:15:46,077 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:46,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2015821910, now seen corresponding path program 1 times [2022-07-13 13:15:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:46,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658480938] [2022-07-13 13:15:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:46,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 13:15:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658480938] [2022-07-13 13:15:46,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658480938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:46,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:46,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:15:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929498871] [2022-07-13 13:15:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:15:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:15:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:15:46,590 INFO L87 Difference]: Start difference. First operand 77208 states and 84863 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:48,392 INFO L93 Difference]: Finished difference Result 162093 states and 178526 transitions. [2022-07-13 13:15:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:15:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2022-07-13 13:15:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:48,489 INFO L225 Difference]: With dead ends: 162093 [2022-07-13 13:15:48,489 INFO L226 Difference]: Without dead ends: 84457 [2022-07-13 13:15:48,528 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:15:48,529 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 335 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:48,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 794 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:15:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84457 states. [2022-07-13 13:15:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84457 to 81046. [2022-07-13 13:15:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81046 states, 81045 states have (on average 1.096477265716577) internal successors, (88864), 81045 states have internal predecessors, (88864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81046 states to 81046 states and 88864 transitions. [2022-07-13 13:15:49,584 INFO L78 Accepts]: Start accepts. Automaton has 81046 states and 88864 transitions. Word has length 470 [2022-07-13 13:15:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:49,584 INFO L495 AbstractCegarLoop]: Abstraction has 81046 states and 88864 transitions. [2022-07-13 13:15:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 81046 states and 88864 transitions. [2022-07-13 13:15:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-07-13 13:15:49,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:49,592 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 13:15:49,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 233794554, now seen corresponding path program 1 times [2022-07-13 13:15:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:49,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116471422] [2022-07-13 13:15:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:49,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116471422] [2022-07-13 13:15:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116471422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 13:15:49,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254473730] [2022-07-13 13:15:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:49,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 13:15:49,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 13:15:49,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 13:15:49,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 13:15:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 13:15:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 13:15:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:50,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 13:15:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-13 13:15:51,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254473730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 13:15:51,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 13:15:51,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-07-13 13:15:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424436690] [2022-07-13 13:15:51,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 13:15:51,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 13:15:51,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 13:15:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-13 13:15:51,733 INFO L87 Difference]: Start difference. First operand 81046 states and 88864 transitions. Second operand has 8 states, 8 states have (on average 116.125) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:15:56,717 INFO L93 Difference]: Finished difference Result 198688 states and 218557 transitions. [2022-07-13 13:15:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 13:15:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 483 [2022-07-13 13:15:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:15:56,866 INFO L225 Difference]: With dead ends: 198688 [2022-07-13 13:15:56,867 INFO L226 Difference]: Without dead ends: 117644 [2022-07-13 13:15:56,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-13 13:15:56,918 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 3732 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4429 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3732 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 5720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 4429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:15:56,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3732 Valid, 230 Invalid, 5720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 4429 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 13:15:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117644 states. [2022-07-13 13:15:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117644 to 102730. [2022-07-13 13:15:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102730 states, 102729 states have (on average 1.0995531933533862) internal successors, (112956), 102729 states have internal predecessors, (112956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102730 states to 102730 states and 112956 transitions. [2022-07-13 13:15:58,386 INFO L78 Accepts]: Start accepts. Automaton has 102730 states and 112956 transitions. Word has length 483 [2022-07-13 13:15:58,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:15:58,387 INFO L495 AbstractCegarLoop]: Abstraction has 102730 states and 112956 transitions. [2022-07-13 13:15:58,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.125) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:15:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 102730 states and 112956 transitions. [2022-07-13 13:15:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-07-13 13:15:58,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:15:58,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:15:58,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 13:15:58,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 13:15:58,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:15:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:15:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1207690160, now seen corresponding path program 1 times [2022-07-13 13:15:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:15:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149670116] [2022-07-13 13:15:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:15:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:15:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:15:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:15:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:15:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149670116] [2022-07-13 13:15:58,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149670116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:15:58,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:15:58,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:15:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408720538] [2022-07-13 13:15:58,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:15:58,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:15:58,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:15:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:15:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:15:58,826 INFO L87 Difference]: Start difference. First operand 102730 states and 112956 transitions. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:01,952 INFO L93 Difference]: Finished difference Result 222502 states and 245137 transitions. [2022-07-13 13:16:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 611 [2022-07-13 13:16:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:02,107 INFO L225 Difference]: With dead ends: 222502 [2022-07-13 13:16:02,107 INFO L226 Difference]: Without dead ends: 117629 [2022-07-13 13:16:02,161 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:02,162 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 535 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:02,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 677 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-13 13:16:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117629 states. [2022-07-13 13:16:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117629 to 112515. [2022-07-13 13:16:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112515 states, 112514 states have (on average 1.0970990276765558) internal successors, (123439), 112514 states have internal predecessors, (123439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112515 states to 112515 states and 123439 transitions. [2022-07-13 13:16:03,807 INFO L78 Accepts]: Start accepts. Automaton has 112515 states and 123439 transitions. Word has length 611 [2022-07-13 13:16:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:03,808 INFO L495 AbstractCegarLoop]: Abstraction has 112515 states and 123439 transitions. [2022-07-13 13:16:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 112515 states and 123439 transitions. [2022-07-13 13:16:03,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-07-13 13:16:03,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:03,821 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:16:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 13:16:03,822 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash -652933035, now seen corresponding path program 1 times [2022-07-13 13:16:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:03,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444756508] [2022-07-13 13:16:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-13 13:16:04,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:04,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444756508] [2022-07-13 13:16:04,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444756508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:04,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:04,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:16:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063381022] [2022-07-13 13:16:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:04,217 INFO L87 Difference]: Start difference. First operand 112515 states and 123439 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:06,411 INFO L93 Difference]: Finished difference Result 236507 states and 259059 transitions. [2022-07-13 13:16:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 616 [2022-07-13 13:16:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:06,558 INFO L225 Difference]: With dead ends: 236507 [2022-07-13 13:16:06,559 INFO L226 Difference]: Without dead ends: 123568 [2022-07-13 13:16:06,600 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:06,601 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 444 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:06,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 372 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:16:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123568 states. [2022-07-13 13:16:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123568 to 113355. [2022-07-13 13:16:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113355 states, 113354 states have (on average 1.0907599202498368) internal successors, (123642), 113354 states have internal predecessors, (123642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113355 states to 113355 states and 123642 transitions. [2022-07-13 13:16:08,190 INFO L78 Accepts]: Start accepts. Automaton has 113355 states and 123642 transitions. Word has length 616 [2022-07-13 13:16:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:08,190 INFO L495 AbstractCegarLoop]: Abstraction has 113355 states and 123642 transitions. [2022-07-13 13:16:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113355 states and 123642 transitions. [2022-07-13 13:16:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-07-13 13:16:08,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:08,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:08,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 13:16:08,205 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash -357199307, now seen corresponding path program 1 times [2022-07-13 13:16:08,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938970707] [2022-07-13 13:16:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-07-13 13:16:08,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:08,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938970707] [2022-07-13 13:16:08,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938970707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:08,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:08,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705172813] [2022-07-13 13:16:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:08,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:08,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:08,365 INFO L87 Difference]: Start difference. First operand 113355 states and 123642 transitions. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:11,209 INFO L93 Difference]: Finished difference Result 236526 states and 257532 transitions. [2022-07-13 13:16:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 630 [2022-07-13 13:16:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:11,414 INFO L225 Difference]: With dead ends: 236526 [2022-07-13 13:16:11,414 INFO L226 Difference]: Without dead ends: 123173 [2022-07-13 13:16:11,509 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:11,510 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 862 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 782 Invalid, 3002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 13:16:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123173 states. [2022-07-13 13:16:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123173 to 112930. [2022-07-13 13:16:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112930 states, 112929 states have (on average 1.0906321671138504) internal successors, (123164), 112929 states have internal predecessors, (123164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112930 states to 112930 states and 123164 transitions. [2022-07-13 13:16:13,045 INFO L78 Accepts]: Start accepts. Automaton has 112930 states and 123164 transitions. Word has length 630 [2022-07-13 13:16:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:13,046 INFO L495 AbstractCegarLoop]: Abstraction has 112930 states and 123164 transitions. [2022-07-13 13:16:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 112930 states and 123164 transitions. [2022-07-13 13:16:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-07-13 13:16:13,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:13,312 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 13:16:13,313 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2121375061, now seen corresponding path program 1 times [2022-07-13 13:16:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482182048] [2022-07-13 13:16:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 13:16:13,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482182048] [2022-07-13 13:16:13,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482182048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:13,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:13,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:16:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117374720] [2022-07-13 13:16:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:13,631 INFO L87 Difference]: Start difference. First operand 112930 states and 123164 transitions. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:15,733 INFO L93 Difference]: Finished difference Result 236070 states and 257093 transitions. [2022-07-13 13:16:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 638 [2022-07-13 13:16:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:15,880 INFO L225 Difference]: With dead ends: 236070 [2022-07-13 13:16:15,881 INFO L226 Difference]: Without dead ends: 119736 [2022-07-13 13:16:15,918 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:15,919 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 312 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:15,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 595 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:16:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119736 states. [2022-07-13 13:16:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119736 to 116327. [2022-07-13 13:16:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116327 states, 116326 states have (on average 1.0846414387153345) internal successors, (126172), 116326 states have internal predecessors, (126172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116327 states to 116327 states and 126172 transitions. [2022-07-13 13:16:17,665 INFO L78 Accepts]: Start accepts. Automaton has 116327 states and 126172 transitions. Word has length 638 [2022-07-13 13:16:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:17,666 INFO L495 AbstractCegarLoop]: Abstraction has 116327 states and 126172 transitions. [2022-07-13 13:16:17,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 116327 states and 126172 transitions. [2022-07-13 13:16:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2022-07-13 13:16:17,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:17,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 13:16:17,677 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1231822094, now seen corresponding path program 1 times [2022-07-13 13:16:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:17,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745216076] [2022-07-13 13:16:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 13:16:17,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745216076] [2022-07-13 13:16:17,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745216076] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:17,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:17,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 13:16:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814491446] [2022-07-13 13:16:17,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 13:16:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 13:16:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 13:16:17,853 INFO L87 Difference]: Start difference. First operand 116327 states and 126172 transitions. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:20,938 INFO L93 Difference]: Finished difference Result 253088 states and 274202 transitions. [2022-07-13 13:16:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 13:16:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 642 [2022-07-13 13:16:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:21,085 INFO L225 Difference]: With dead ends: 253088 [2022-07-13 13:16:21,085 INFO L226 Difference]: Without dead ends: 135488 [2022-07-13 13:16:21,151 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:21,151 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 530 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 3100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:21,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 662 Invalid, 3100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-13 13:16:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135488 states. [2022-07-13 13:16:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135488 to 122713. [2022-07-13 13:16:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122713 states, 122712 states have (on average 1.0825265662689876) internal successors, (132839), 122712 states have internal predecessors, (132839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122713 states to 122713 states and 132839 transitions. [2022-07-13 13:16:22,993 INFO L78 Accepts]: Start accepts. Automaton has 122713 states and 132839 transitions. Word has length 642 [2022-07-13 13:16:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:22,994 INFO L495 AbstractCegarLoop]: Abstraction has 122713 states and 132839 transitions. [2022-07-13 13:16:22,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 122713 states and 132839 transitions. [2022-07-13 13:16:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2022-07-13 13:16:23,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:23,038 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 13:16:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 13:16:23,038 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash -300130635, now seen corresponding path program 1 times [2022-07-13 13:16:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:23,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426165593] [2022-07-13 13:16:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-13 13:16:23,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426165593] [2022-07-13 13:16:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426165593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:23,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:23,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 13:16:23,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165905295] [2022-07-13 13:16:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:23,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:23,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:23,294 INFO L87 Difference]: Start difference. First operand 122713 states and 132839 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:24,758 INFO L93 Difference]: Finished difference Result 234323 states and 252605 transitions. [2022-07-13 13:16:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 653 [2022-07-13 13:16:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:24,878 INFO L225 Difference]: With dead ends: 234323 [2022-07-13 13:16:24,878 INFO L226 Difference]: Without dead ends: 111611 [2022-07-13 13:16:24,942 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:24,945 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 398 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:24,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 88 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 13:16:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111611 states. [2022-07-13 13:16:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111611 to 111172. [2022-07-13 13:16:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111172 states, 111171 states have (on average 1.0729956553417708) internal successors, (119286), 111171 states have internal predecessors, (119286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111172 states to 111172 states and 119286 transitions. [2022-07-13 13:16:26,532 INFO L78 Accepts]: Start accepts. Automaton has 111172 states and 119286 transitions. Word has length 653 [2022-07-13 13:16:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 13:16:26,532 INFO L495 AbstractCegarLoop]: Abstraction has 111172 states and 119286 transitions. [2022-07-13 13:16:26,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111172 states and 119286 transitions. [2022-07-13 13:16:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-07-13 13:16:26,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 13:16:26,543 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 13:16:26,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 13:16:26,543 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 13:16:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 13:16:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1305299039, now seen corresponding path program 1 times [2022-07-13 13:16:26,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 13:16:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379971282] [2022-07-13 13:16:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 13:16:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 13:16:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 13:16:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 615 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-13 13:16:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 13:16:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379971282] [2022-07-13 13:16:26,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379971282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 13:16:26,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 13:16:26,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 13:16:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928735419] [2022-07-13 13:16:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 13:16:26,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 13:16:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 13:16:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 13:16:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 13:16:26,700 INFO L87 Difference]: Start difference. First operand 111172 states and 119286 transitions. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 13:16:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 13:16:28,751 INFO L93 Difference]: Finished difference Result 231707 states and 248423 transitions. [2022-07-13 13:16:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 13:16:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 656 [2022-07-13 13:16:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 13:16:28,899 INFO L225 Difference]: With dead ends: 231707 [2022-07-13 13:16:28,900 INFO L226 Difference]: Without dead ends: 120537 [2022-07-13 13:16:28,956 INFO L412 NwaCegarLoop]: 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 [2022-07-13 13:16:28,957 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 252 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 13:16:28,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 251 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 13:16:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120537 states.