./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.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 4fdd5c1041cb450f4848a5d2243efab154355b9039f1e674dfe24010b27b76eb --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 20:26:37,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 20:26:37,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 20:26:37,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 20:26:37,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 20:26:37,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 20:26:37,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 20:26:37,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 20:26:37,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 20:26:37,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 20:26:37,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 20:26:37,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 20:26:37,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 20:26:37,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 20:26:37,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 20:26:37,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 20:26:37,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 20:26:37,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 20:26:37,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 20:26:37,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 20:26:37,950 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 20:26:37,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 20:26:37,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 20:26:37,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 20:26:37,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 20:26:37,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 20:26:37,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 20:26:37,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 20:26:37,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 20:26:37,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 20:26:37,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 20:26:37,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 20:26:37,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 20:26:37,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 20:26:37,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 20:26:37,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 20:26:37,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 20:26:37,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 20:26:37,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 20:26:37,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 20:26:37,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 20:26:37,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 20:26:37,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 20:26:38,001 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 20:26:38,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 20:26:38,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 20:26:38,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 20:26:38,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 20:26:38,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 20:26:38,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 20:26:38,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 20:26:38,009 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 20:26:38,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 20:26:38,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 20:26:38,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 20:26:38,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 20:26:38,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 20:26:38,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 20:26:38,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 20:26:38,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 20:26:38,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 20:26:38,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:26:38,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 20:26:38,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 20:26:38,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 20:26:38,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 20:26:38,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 20:26:38,014 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 20:26:38,014 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 20:26:38,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 20:26:38,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fdd5c1041cb450f4848a5d2243efab154355b9039f1e674dfe24010b27b76eb [2022-07-22 20:26:38,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 20:26:38,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 20:26:38,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 20:26:38,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 20:26:38,211 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 20:26:38,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2022-07-22 20:26:38,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c32206cb/6123345e816a4a9abc20d6935805a5bf/FLAG7bc1ddd33 [2022-07-22 20:26:38,854 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 20:26:38,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2022-07-22 20:26:38,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c32206cb/6123345e816a4a9abc20d6935805a5bf/FLAG7bc1ddd33 [2022-07-22 20:26:39,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c32206cb/6123345e816a4a9abc20d6935805a5bf [2022-07-22 20:26:39,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 20:26:39,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 20:26:39,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 20:26:39,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 20:26:39,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 20:26:39,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:26:39" (1/1) ... [2022-07-22 20:26:39,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@711d2704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:39, skipping insertion in model container [2022-07-22 20:26:39,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 08:26:39" (1/1) ... [2022-07-22 20:26:39,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 20:26:39,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 20:26:39,400 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c[8712,8725] [2022-07-22 20:26:39,414 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c[9554,9567] [2022-07-22 20:26:39,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:26:39,935 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 20:26:39,964 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c[8712,8725] [2022-07-22 20:26:39,966 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c[9554,9567] [2022-07-22 20:26:40,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 20:26:40,260 INFO L208 MainTranslator]: Completed translation [2022-07-22 20:26:40,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40 WrapperNode [2022-07-22 20:26:40,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 20:26:40,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 20:26:40,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 20:26:40,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 20:26:40,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,578 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5031 [2022-07-22 20:26:40,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 20:26:40,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 20:26:40,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 20:26:40,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 20:26:40,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:40,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:41,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 20:26:41,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 20:26:41,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 20:26:41,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 20:26:41,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (1/1) ... [2022-07-22 20:26:41,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 20:26:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:26:41,041 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) [2022-07-22 20:26:41,069 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 [2022-07-22 20:26:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 20:26:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 20:26:41,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 20:26:41,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 20:26:41,169 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 20:26:41,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 20:26:43,715 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 20:26:43,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 20:26:43,724 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 20:26:43,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:26:43 BoogieIcfgContainer [2022-07-22 20:26:43,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 20:26:43,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 20:26:43,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 20:26:43,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 20:26:43,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 08:26:39" (1/3) ... [2022-07-22 20:26:43,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c57a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:26:43, skipping insertion in model container [2022-07-22 20:26:43,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 08:26:40" (2/3) ... [2022-07-22 20:26:43,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c57a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 08:26:43, skipping insertion in model container [2022-07-22 20:26:43,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 08:26:43" (3/3) ... [2022-07-22 20:26:43,732 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label07.c [2022-07-22 20:26:43,741 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 20:26:43,742 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 20:26:43,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 20:26:43,803 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@68f7d184, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@118e716 [2022-07-22 20:26:43,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 20:26:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 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) [2022-07-22 20:26:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 20:26:43,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:43,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:43,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2135311811, now seen corresponding path program 1 times [2022-07-22 20:26:43,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:43,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451527367] [2022-07-22 20:26:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:43,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451527367] [2022-07-22 20:26:43,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451527367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:43,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:43,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 20:26:43,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141588850] [2022-07-22 20:26:43,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:43,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:43,970 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-22 20:26:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:46,602 INFO L93 Difference]: Finished difference Result 2514 states and 4838 transitions. [2022-07-22 20:26:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-22 20:26:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:46,636 INFO L225 Difference]: With dead ends: 2514 [2022-07-22 20:26:46,636 INFO L226 Difference]: Without dead ends: 1580 [2022-07-22 20:26:46,643 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 [2022-07-22 20:26:46,648 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 952 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:46,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 607 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 20:26:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-07-22 20:26:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-07-22 20:26:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.641318124207858) internal successors, (2590), 1579 states have internal predecessors, (2590), 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) [2022-07-22 20:26:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2590 transitions. [2022-07-22 20:26:46,731 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2590 transitions. Word has length 7 [2022-07-22 20:26:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:46,732 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2590 transitions. [2022-07-22 20:26:46,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-22 20:26:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2590 transitions. [2022-07-22 20:26:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 20:26:46,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:46,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 20:26:46,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-07-22 20:26:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:46,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878407668] [2022-07-22 20:26:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878407668] [2022-07-22 20:26:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878407668] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:46,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:46,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:26:46,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857074823] [2022-07-22 20:26:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 20:26:46,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 20:26:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 20:26:46,837 INFO L87 Difference]: Start difference. First operand 1580 states and 2590 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-07-22 20:26:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:46,885 INFO L93 Difference]: Finished difference Result 1630 states and 2666 transitions. [2022-07-22 20:26:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 20:26:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 30 [2022-07-22 20:26:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:46,890 INFO L225 Difference]: With dead ends: 1630 [2022-07-22 20:26:46,890 INFO L226 Difference]: Without dead ends: 1580 [2022-07-22 20:26:46,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 20:26:46,893 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:46,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-07-22 20:26:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-07-22 20:26:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.626742712294043) internal successors, (2567), 1579 states have internal predecessors, (2567), 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) [2022-07-22 20:26:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2567 transitions. [2022-07-22 20:26:46,916 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2567 transitions. Word has length 30 [2022-07-22 20:26:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:46,916 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2567 transitions. [2022-07-22 20:26:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2022-07-22 20:26:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2567 transitions. [2022-07-22 20:26:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 20:26:46,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:46,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:46,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 20:26:46,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-07-22 20:26:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218817233] [2022-07-22 20:26:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218817233] [2022-07-22 20:26:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218817233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329447656] [2022-07-22 20:26:47,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:47,020 INFO L87 Difference]: Start difference. First operand 1580 states and 2567 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-07-22 20:26:47,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,144 INFO L93 Difference]: Finished difference Result 1948 states and 3143 transitions. [2022-07-22 20:26:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 20:26:47,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2022-07-22 20:26:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,150 INFO L225 Difference]: With dead ends: 1948 [2022-07-22 20:26:47,150 INFO L226 Difference]: Without dead ends: 1902 [2022-07-22 20:26:47,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 20:26:47,152 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 20:26:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-07-22 20:26:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2022-07-22 20:26:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.625154130702836) internal successors, (2636), 1623 states have internal predecessors, (2636), 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) [2022-07-22 20:26:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2636 transitions. [2022-07-22 20:26:47,177 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2636 transitions. Word has length 52 [2022-07-22 20:26:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:47,178 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2636 transitions. [2022-07-22 20:26:47,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-07-22 20:26:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2636 transitions. [2022-07-22 20:26:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:47,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:47,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 20:26:47,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-07-22 20:26:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:47,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520198236] [2022-07-22 20:26:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520198236] [2022-07-22 20:26:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520198236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:47,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630944488] [2022-07-22 20:26:47,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:47,231 INFO L87 Difference]: Start difference. First operand 1624 states and 2636 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,261 INFO L93 Difference]: Finished difference Result 1793 states and 2899 transitions. [2022-07-22 20:26:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-07-22 20:26:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,267 INFO L225 Difference]: With dead ends: 1793 [2022-07-22 20:26:47,267 INFO L226 Difference]: Without dead ends: 1703 [2022-07-22 20:26:47,268 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 [2022-07-22 20:26:47,269 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-07-22 20:26:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2022-07-22 20:26:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.6205067766647023) internal successors, (2750), 1698 states have internal predecessors, (2750), 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) [2022-07-22 20:26:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2750 transitions. [2022-07-22 20:26:47,294 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2750 transitions. Word has length 54 [2022-07-22 20:26:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:47,294 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2750 transitions. [2022-07-22 20:26:47,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2750 transitions. [2022-07-22 20:26:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:47,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:47,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 20:26:47,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:47,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2022-07-22 20:26:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:47,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372468436] [2022-07-22 20:26:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372468436] [2022-07-22 20:26:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372468436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051291999] [2022-07-22 20:26:47,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:47,411 INFO L87 Difference]: Start difference. First operand 1699 states and 2750 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,504 INFO L93 Difference]: Finished difference Result 1866 states and 3006 transitions. [2022-07-22 20:26:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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 54 [2022-07-22 20:26:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,511 INFO L225 Difference]: With dead ends: 1866 [2022-07-22 20:26:47,511 INFO L226 Difference]: Without dead ends: 1701 [2022-07-22 20:26:47,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:26:47,514 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1593 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 1814 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-07-22 20:26:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2022-07-22 20:26:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.6193282262816735) internal successors, (2748), 1698 states have internal predecessors, (2748), 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) [2022-07-22 20:26:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2748 transitions. [2022-07-22 20:26:47,543 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2748 transitions. Word has length 54 [2022-07-22 20:26:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:47,545 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2748 transitions. [2022-07-22 20:26:47,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2748 transitions. [2022-07-22 20:26:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:47,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:47,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:47,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 20:26:47,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-07-22 20:26:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551745909] [2022-07-22 20:26:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551745909] [2022-07-22 20:26:47,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551745909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970535373] [2022-07-22 20:26:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:47,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:47,579 INFO L87 Difference]: Start difference. First operand 1699 states and 2748 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,608 INFO L93 Difference]: Finished difference Result 2005 states and 3214 transitions. [2022-07-22 20:26:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-07-22 20:26:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,613 INFO L225 Difference]: With dead ends: 2005 [2022-07-22 20:26:47,613 INFO L226 Difference]: Without dead ends: 1840 [2022-07-22 20:26:47,614 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 [2022-07-22 20:26:47,615 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-07-22 20:26:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2022-07-22 20:26:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.6100217864923747) internal successors, (2956), 1837 states have internal predecessors, (2956), 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) [2022-07-22 20:26:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 2956 transitions. [2022-07-22 20:26:47,657 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 2956 transitions. Word has length 54 [2022-07-22 20:26:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:47,657 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 2956 transitions. [2022-07-22 20:26:47,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 2956 transitions. [2022-07-22 20:26:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:47,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:47,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:47,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 20:26:47,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-07-22 20:26:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196183399] [2022-07-22 20:26:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196183399] [2022-07-22 20:26:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196183399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533454039] [2022-07-22 20:26:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:47,714 INFO L87 Difference]: Start difference. First operand 1838 states and 2956 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,757 INFO L93 Difference]: Finished difference Result 2398 states and 3798 transitions. [2022-07-22 20:26:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-07-22 20:26:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,764 INFO L225 Difference]: With dead ends: 2398 [2022-07-22 20:26:47,764 INFO L226 Difference]: Without dead ends: 2094 [2022-07-22 20:26:47,765 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 [2022-07-22 20:26:47,765 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2022-07-22 20:26:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2022-07-22 20:26:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.5923444976076555) internal successors, (3328), 2091 states have internal predecessors, (3328), 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) [2022-07-22 20:26:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3328 transitions. [2022-07-22 20:26:47,852 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3328 transitions. Word has length 54 [2022-07-22 20:26:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:47,852 INFO L495 AbstractCegarLoop]: Abstraction has 2092 states and 3328 transitions. [2022-07-22 20:26:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3328 transitions. [2022-07-22 20:26:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 20:26:47,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:47,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:47,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 20:26:47,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-07-22 20:26:47,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:47,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179658552] [2022-07-22 20:26:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:47,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:47,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:47,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179658552] [2022-07-22 20:26:47,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179658552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:47,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:47,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141093323] [2022-07-22 20:26:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:47,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:47,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:47,877 INFO L87 Difference]: Start difference. First operand 2092 states and 3328 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:47,934 INFO L93 Difference]: Finished difference Result 3112 states and 4834 transitions. [2022-07-22 20:26:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-07-22 20:26:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:47,941 INFO L225 Difference]: With dead ends: 3112 [2022-07-22 20:26:47,941 INFO L226 Difference]: Without dead ends: 2554 [2022-07-22 20:26:47,942 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 [2022-07-22 20:26:47,943 INFO L413 NwaCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:47,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-07-22 20:26:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2022-07-22 20:26:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.5623529411764705) internal successors, (3984), 2551 states have internal predecessors, (3984), 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) [2022-07-22 20:26:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3984 transitions. [2022-07-22 20:26:48,004 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3984 transitions. Word has length 54 [2022-07-22 20:26:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 3984 transitions. [2022-07-22 20:26:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-07-22 20:26:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3984 transitions. [2022-07-22 20:26:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 20:26:48,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:48,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 20:26:48,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-07-22 20:26:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019797967] [2022-07-22 20:26:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:48,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019797967] [2022-07-22 20:26:48,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019797967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:48,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:48,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 20:26:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504277135] [2022-07-22 20:26:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:48,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 20:26:48,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 20:26:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 20:26:48,060 INFO L87 Difference]: Start difference. First operand 2552 states and 3984 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2022-07-22 20:26:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:48,236 INFO L93 Difference]: Finished difference Result 3322 states and 5085 transitions. [2022-07-22 20:26:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 20:26:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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 55 [2022-07-22 20:26:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:48,245 INFO L225 Difference]: With dead ends: 3322 [2022-07-22 20:26:48,245 INFO L226 Difference]: Without dead ends: 3320 [2022-07-22 20:26:48,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-22 20:26:48,246 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:48,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2022-07-22 20:26:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2022-07-22 20:26:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.5488837567359508) internal successors, (4024), 2599 states have internal predecessors, (4024), 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) [2022-07-22 20:26:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4024 transitions. [2022-07-22 20:26:48,323 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4024 transitions. Word has length 55 [2022-07-22 20:26:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:48,323 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 4024 transitions. [2022-07-22 20:26:48,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 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) [2022-07-22 20:26:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4024 transitions. [2022-07-22 20:26:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 20:26:48,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:48,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:48,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 20:26:48,324 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:48,325 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-07-22 20:26:48,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:48,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181241223] [2022-07-22 20:26:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:48,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:48,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181241223] [2022-07-22 20:26:48,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181241223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:48,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:48,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833363479] [2022-07-22 20:26:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:48,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:48,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:48,345 INFO L87 Difference]: Start difference. First operand 2600 states and 4024 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-07-22 20:26:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:48,440 INFO L93 Difference]: Finished difference Result 3695 states and 5614 transitions. [2022-07-22 20:26:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-07-22 20:26:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:48,482 INFO L225 Difference]: With dead ends: 3695 [2022-07-22 20:26:48,482 INFO L226 Difference]: Without dead ends: 3084 [2022-07-22 20:26:48,483 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 [2022-07-22 20:26:48,484 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-07-22 20:26:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2022-07-22 20:26:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.5253246753246754) internal successors, (4698), 3081 states have internal predecessors, (4698), 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) [2022-07-22 20:26:48,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4698 transitions. [2022-07-22 20:26:48,617 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4698 transitions. Word has length 56 [2022-07-22 20:26:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:48,617 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4698 transitions. [2022-07-22 20:26:48,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-07-22 20:26:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4698 transitions. [2022-07-22 20:26:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 20:26:48,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:48,619 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:48,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 20:26:48,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash 616097437, now seen corresponding path program 1 times [2022-07-22 20:26:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:48,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796478775] [2022-07-22 20:26:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796478775] [2022-07-22 20:26:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796478775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:48,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:48,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:48,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501369965] [2022-07-22 20:26:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:48,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:48,654 INFO L87 Difference]: Start difference. First operand 3082 states and 4698 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-07-22 20:26:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:51,616 INFO L93 Difference]: Finished difference Result 6088 states and 9625 transitions. [2022-07-22 20:26:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2022-07-22 20:26:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:51,655 INFO L225 Difference]: With dead ends: 6088 [2022-07-22 20:26:51,655 INFO L226 Difference]: Without dead ends: 4584 [2022-07-22 20:26:51,659 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 [2022-07-22 20:26:51,659 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 762 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:51,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1359 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 20:26:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2022-07-22 20:26:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4584. [2022-07-22 20:26:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4584 states, 4582 states have (on average 1.4958533391532083) internal successors, (6854), 4583 states have internal predecessors, (6854), 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) [2022-07-22 20:26:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4584 states to 4584 states and 6854 transitions. [2022-07-22 20:26:51,836 INFO L78 Accepts]: Start accepts. Automaton has 4584 states and 6854 transitions. Word has length 78 [2022-07-22 20:26:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:51,836 INFO L495 AbstractCegarLoop]: Abstraction has 4584 states and 6854 transitions. [2022-07-22 20:26:51,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-07-22 20:26:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4584 states and 6854 transitions. [2022-07-22 20:26:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:51,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:51,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:51,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 20:26:51,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:51,844 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-07-22 20:26:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:51,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785997387] [2022-07-22 20:26:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:51,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 20:26:51,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:51,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785997387] [2022-07-22 20:26:51,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785997387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:51,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:51,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:51,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701010433] [2022-07-22 20:26:51,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:51,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:51,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:51,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:51,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:51,918 INFO L87 Difference]: Start difference. First operand 4584 states and 6854 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2022-07-22 20:26:52,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:52,340 INFO L93 Difference]: Finished difference Result 11090 states and 16095 transitions. [2022-07-22 20:26:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:52,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 79 [2022-07-22 20:26:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:52,356 INFO L225 Difference]: With dead ends: 11090 [2022-07-22 20:26:52,356 INFO L226 Difference]: Without dead ends: 9544 [2022-07-22 20:26:52,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:52,361 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4790 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4790 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:52,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4790 Valid, 3371 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9544 states. [2022-07-22 20:26:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9544 to 6128. [2022-07-22 20:26:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6128 states, 6126 states have (on average 1.4740450538687562) internal successors, (9030), 6127 states have internal predecessors, (9030), 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) [2022-07-22 20:26:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6128 states to 6128 states and 9030 transitions. [2022-07-22 20:26:52,573 INFO L78 Accepts]: Start accepts. Automaton has 6128 states and 9030 transitions. Word has length 79 [2022-07-22 20:26:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:52,573 INFO L495 AbstractCegarLoop]: Abstraction has 6128 states and 9030 transitions. [2022-07-22 20:26:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2022-07-22 20:26:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6128 states and 9030 transitions. [2022-07-22 20:26:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:52,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:52,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 20:26:52,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2022-07-22 20:26:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:52,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959086182] [2022-07-22 20:26:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:52,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 20:26:52,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:52,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959086182] [2022-07-22 20:26:52,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959086182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:52,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:52,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666811994] [2022-07-22 20:26:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:52,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:52,627 INFO L87 Difference]: Start difference. First operand 6128 states and 9030 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2022-07-22 20:26:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:53,033 INFO L93 Difference]: Finished difference Result 12634 states and 18271 transitions. [2022-07-22 20:26:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:53,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 79 [2022-07-22 20:26:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:53,050 INFO L225 Difference]: With dead ends: 12634 [2022-07-22 20:26:53,050 INFO L226 Difference]: Without dead ends: 11088 [2022-07-22 20:26:53,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:53,056 INFO L413 NwaCegarLoop]: 1603 mSDtfsCounter, 4739 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:53,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4739 Valid, 3418 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11088 states. [2022-07-22 20:26:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11088 to 8448. [2022-07-22 20:26:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8448 states, 8446 states have (on average 1.4532322993132845) internal successors, (12274), 8447 states have internal predecessors, (12274), 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) [2022-07-22 20:26:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8448 states to 8448 states and 12274 transitions. [2022-07-22 20:26:53,439 INFO L78 Accepts]: Start accepts. Automaton has 8448 states and 12274 transitions. Word has length 79 [2022-07-22 20:26:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:53,439 INFO L495 AbstractCegarLoop]: Abstraction has 8448 states and 12274 transitions. [2022-07-22 20:26:53,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2022-07-22 20:26:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8448 states and 12274 transitions. [2022-07-22 20:26:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 20:26:53,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:53,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:53,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 20:26:53,441 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2022-07-22 20:26:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:53,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089049570] [2022-07-22 20:26:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:53,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 20:26:53,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089049570] [2022-07-22 20:26:53,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089049570] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:53,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:53,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831739340] [2022-07-22 20:26:53,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:53,483 INFO L87 Difference]: Start difference. First operand 8448 states and 12274 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2022-07-22 20:26:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:53,929 INFO L93 Difference]: Finished difference Result 14178 states and 20447 transitions. [2022-07-22 20:26:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 79 [2022-07-22 20:26:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:53,952 INFO L225 Difference]: With dead ends: 14178 [2022-07-22 20:26:53,953 INFO L226 Difference]: Without dead ends: 12632 [2022-07-22 20:26:53,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:53,960 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:53,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12632 states. [2022-07-22 20:26:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12632 to 9992. [2022-07-22 20:26:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 9990 states have (on average 1.4464464464464464) internal successors, (14450), 9991 states have internal predecessors, (14450), 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) [2022-07-22 20:26:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 14450 transitions. [2022-07-22 20:26:54,719 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 14450 transitions. Word has length 79 [2022-07-22 20:26:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:54,719 INFO L495 AbstractCegarLoop]: Abstraction has 9992 states and 14450 transitions. [2022-07-22 20:26:54,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2022-07-22 20:26:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 14450 transitions. [2022-07-22 20:26:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 20:26:54,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:54,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 20:26:54,723 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2022-07-22 20:26:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32996746] [2022-07-22 20:26:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32996746] [2022-07-22 20:26:54,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32996746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:54,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:54,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12730392] [2022-07-22 20:26:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:54,785 INFO L87 Difference]: Start difference. First operand 9992 states and 14450 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-07-22 20:26:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:55,037 INFO L93 Difference]: Finished difference Result 14918 states and 21467 transitions. [2022-07-22 20:26:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2022-07-22 20:26:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:55,051 INFO L225 Difference]: With dead ends: 14918 [2022-07-22 20:26:55,051 INFO L226 Difference]: Without dead ends: 7964 [2022-07-22 20:26:55,059 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 [2022-07-22 20:26:55,060 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:55,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7964 states. [2022-07-22 20:26:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7964 to 7962. [2022-07-22 20:26:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7962 states, 7960 states have (on average 1.45678391959799) internal successors, (11596), 7961 states have internal predecessors, (11596), 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) [2022-07-22 20:26:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7962 states to 7962 states and 11596 transitions. [2022-07-22 20:26:55,480 INFO L78 Accepts]: Start accepts. Automaton has 7962 states and 11596 transitions. Word has length 81 [2022-07-22 20:26:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:55,481 INFO L495 AbstractCegarLoop]: Abstraction has 7962 states and 11596 transitions. [2022-07-22 20:26:55,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-07-22 20:26:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7962 states and 11596 transitions. [2022-07-22 20:26:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 20:26:55,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:55,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:26:55,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 20:26:55,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-07-22 20:26:55,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824900357] [2022-07-22 20:26:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:26:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824900357] [2022-07-22 20:26:55,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824900357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:55,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:55,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 20:26:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066681978] [2022-07-22 20:26:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:55,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:26:55,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:26:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:26:55,538 INFO L87 Difference]: Start difference. First operand 7962 states and 11596 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-22 20:26:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:56,066 INFO L93 Difference]: Finished difference Result 12324 states and 17809 transitions. [2022-07-22 20:26:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:26:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 81 [2022-07-22 20:26:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:56,078 INFO L225 Difference]: With dead ends: 12324 [2022-07-22 20:26:56,078 INFO L226 Difference]: Without dead ends: 11234 [2022-07-22 20:26:56,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:26:56,082 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 4758 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:56,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4758 Valid, 3390 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2022-07-22 20:26:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 9050. [2022-07-22 20:26:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9048 states have (on average 1.4513704686118478) internal successors, (13132), 9049 states have internal predecessors, (13132), 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) [2022-07-22 20:26:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 13132 transitions. [2022-07-22 20:26:56,513 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 13132 transitions. Word has length 81 [2022-07-22 20:26:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:56,513 INFO L495 AbstractCegarLoop]: Abstraction has 9050 states and 13132 transitions. [2022-07-22 20:26:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-07-22 20:26:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 13132 transitions. [2022-07-22 20:26:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 20:26:56,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:56,519 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:26:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 20:26:56,520 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1775944410, now seen corresponding path program 1 times [2022-07-22 20:26:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:56,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803335337] [2022-07-22 20:26:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:56,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:56,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803335337] [2022-07-22 20:26:56,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803335337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:56,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:56,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 20:26:56,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835709125] [2022-07-22 20:26:56,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:56,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:56,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:56,549 INFO L87 Difference]: Start difference. First operand 9050 states and 13132 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-07-22 20:26:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:59,030 INFO L93 Difference]: Finished difference Result 13558 states and 20215 transitions. [2022-07-22 20:26:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 81 [2022-07-22 20:26:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:59,043 INFO L225 Difference]: With dead ends: 13558 [2022-07-22 20:26:59,044 INFO L226 Difference]: Without dead ends: 10552 [2022-07-22 20:26:59,049 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 [2022-07-22 20:26:59,052 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 825 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:59,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 256 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 20:26:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2022-07-22 20:26:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 10552. [2022-07-22 20:26:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10552 states, 10550 states have (on average 1.4701421800947867) internal successors, (15510), 10551 states have internal predecessors, (15510), 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) [2022-07-22 20:26:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10552 states to 10552 states and 15510 transitions. [2022-07-22 20:26:59,667 INFO L78 Accepts]: Start accepts. Automaton has 10552 states and 15510 transitions. Word has length 81 [2022-07-22 20:26:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:26:59,667 INFO L495 AbstractCegarLoop]: Abstraction has 10552 states and 15510 transitions. [2022-07-22 20:26:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2022-07-22 20:26:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10552 states and 15510 transitions. [2022-07-22 20:26:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:26:59,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:26:59,669 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] [2022-07-22 20:26:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 20:26:59,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:26:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:26:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2022-07-22 20:26:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:26:59,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932360282] [2022-07-22 20:26:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:26:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:26:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:26:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:26:59,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:26:59,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932360282] [2022-07-22 20:26:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932360282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:26:59,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:26:59,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:26:59,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419583201] [2022-07-22 20:26:59,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:26:59,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:26:59,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:26:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:26:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:26:59,710 INFO L87 Difference]: Start difference. First operand 10552 states and 15510 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:26:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:26:59,897 INFO L93 Difference]: Finished difference Result 13548 states and 19736 transitions. [2022-07-22 20:26:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:26:59,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2022-07-22 20:26:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:26:59,905 INFO L225 Difference]: With dead ends: 13548 [2022-07-22 20:26:59,905 INFO L226 Difference]: Without dead ends: 7562 [2022-07-22 20:26:59,910 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 [2022-07-22 20:26:59,911 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:26:59,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:26:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2022-07-22 20:27:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 7560. [2022-07-22 20:27:00,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7560 states, 7558 states have (on average 1.4874305371791479) internal successors, (11242), 7559 states have internal predecessors, (11242), 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) [2022-07-22 20:27:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7560 states to 7560 states and 11242 transitions. [2022-07-22 20:27:00,126 INFO L78 Accepts]: Start accepts. Automaton has 7560 states and 11242 transitions. Word has length 82 [2022-07-22 20:27:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:00,126 INFO L495 AbstractCegarLoop]: Abstraction has 7560 states and 11242 transitions. [2022-07-22 20:27:00,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:27:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7560 states and 11242 transitions. [2022-07-22 20:27:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:27:00,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:00,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:00,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 20:27:00,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2022-07-22 20:27:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:00,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268753281] [2022-07-22 20:27:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:00,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268753281] [2022-07-22 20:27:00,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268753281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:00,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:00,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:27:00,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500589831] [2022-07-22 20:27:00,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:00,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:27:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:27:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:27:00,173 INFO L87 Difference]: Start difference. First operand 7560 states and 11242 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:27:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:00,283 INFO L93 Difference]: Finished difference Result 9060 states and 13334 transitions. [2022-07-22 20:27:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:27:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2022-07-22 20:27:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:00,290 INFO L225 Difference]: With dead ends: 9060 [2022-07-22 20:27:00,290 INFO L226 Difference]: Without dead ends: 6066 [2022-07-22 20:27:00,293 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 [2022-07-22 20:27:00,294 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:00,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2022-07-22 20:27:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 6064. [2022-07-22 20:27:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6064 states, 6062 states have (on average 1.5061035961728801) internal successors, (9130), 6063 states have internal predecessors, (9130), 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) [2022-07-22 20:27:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6064 states to 6064 states and 9130 transitions. [2022-07-22 20:27:00,422 INFO L78 Accepts]: Start accepts. Automaton has 6064 states and 9130 transitions. Word has length 82 [2022-07-22 20:27:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:00,422 INFO L495 AbstractCegarLoop]: Abstraction has 6064 states and 9130 transitions. [2022-07-22 20:27:00,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:27:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6064 states and 9130 transitions. [2022-07-22 20:27:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:27:00,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:00,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 20:27:00,424 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2022-07-22 20:27:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:00,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024874500] [2022-07-22 20:27:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:00,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024874500] [2022-07-22 20:27:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024874500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 20:27:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113210135] [2022-07-22 20:27:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:27:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:27:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:27:00,452 INFO L87 Difference]: Start difference. First operand 6064 states and 9130 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:27:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:00,519 INFO L93 Difference]: Finished difference Result 6816 states and 10166 transitions. [2022-07-22 20:27:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:27:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2022-07-22 20:27:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:00,525 INFO L225 Difference]: With dead ends: 6816 [2022-07-22 20:27:00,526 INFO L226 Difference]: Without dead ends: 5318 [2022-07-22 20:27:00,528 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 [2022-07-22 20:27:00,528 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:00,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2022-07-22 20:27:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 5316. [2022-07-22 20:27:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5314 states have (on average 1.5214527662777568) internal successors, (8085), 5315 states have internal predecessors, (8085), 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) [2022-07-22 20:27:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 8085 transitions. [2022-07-22 20:27:00,674 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 8085 transitions. Word has length 82 [2022-07-22 20:27:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 8085 transitions. [2022-07-22 20:27:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-07-22 20:27:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 8085 transitions. [2022-07-22 20:27:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:27:00,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:00,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:00,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 20:27:00,676 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2022-07-22 20:27:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:00,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352444752] [2022-07-22 20:27:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:00,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352444752] [2022-07-22 20:27:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352444752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:27:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921686748] [2022-07-22 20:27:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:27:00,866 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) [2022-07-22 20:27:00,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 20:27:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 20:27:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:27:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:27:01,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:27:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 20:27:01,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921686748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:27:01,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:27:01,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-22 20:27:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505460817] [2022-07-22 20:27:01,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:27:01,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 20:27:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 20:27:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-22 20:27:01,319 INFO L87 Difference]: Start difference. First operand 5316 states and 8085 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 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) [2022-07-22 20:27:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:03,958 INFO L93 Difference]: Finished difference Result 14475 states and 20296 transitions. [2022-07-22 20:27:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 20:27:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 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 82 [2022-07-22 20:27:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:03,972 INFO L225 Difference]: With dead ends: 14475 [2022-07-22 20:27:03,972 INFO L226 Difference]: Without dead ends: 13725 [2022-07-22 20:27:03,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 20:27:03,977 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 16207 mSDsluCounter, 5140 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16207 SdHoareTripleChecker+Valid, 6687 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:03,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16207 Valid, 6687 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 20:27:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13725 states. [2022-07-22 20:27:04,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13725 to 10985. [2022-07-22 20:27:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10985 states, 10983 states have (on average 1.396977146499135) internal successors, (15343), 10984 states have internal predecessors, (15343), 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) [2022-07-22 20:27:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10985 states to 10985 states and 15343 transitions. [2022-07-22 20:27:04,621 INFO L78 Accepts]: Start accepts. Automaton has 10985 states and 15343 transitions. Word has length 82 [2022-07-22 20:27:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:04,621 INFO L495 AbstractCegarLoop]: Abstraction has 10985 states and 15343 transitions. [2022-07-22 20:27:04,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 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) [2022-07-22 20:27:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10985 states and 15343 transitions. [2022-07-22 20:27:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 20:27:04,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:04,623 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 20:27:04,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 20:27:04,839 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,SelfDestructingSolverStorable20 [2022-07-22 20:27:04,840 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash -251868077, now seen corresponding path program 1 times [2022-07-22 20:27:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:04,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234624588] [2022-07-22 20:27:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:04,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:04,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:04,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234624588] [2022-07-22 20:27:04,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234624588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:04,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:04,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 20:27:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084357243] [2022-07-22 20:27:04,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:04,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 20:27:04,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:04,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 20:27:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 20:27:04,872 INFO L87 Difference]: Start difference. First operand 10985 states and 15343 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-07-22 20:27:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:07,737 INFO L93 Difference]: Finished difference Result 20001 states and 29339 transitions. [2022-07-22 20:27:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 20:27:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 82 [2022-07-22 20:27:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:07,755 INFO L225 Difference]: With dead ends: 20001 [2022-07-22 20:27:07,756 INFO L226 Difference]: Without dead ends: 15493 [2022-07-22 20:27:07,760 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 [2022-07-22 20:27:07,762 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1016 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:07,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 455 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 20:27:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15493 states. [2022-07-22 20:27:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15493 to 15491. [2022-07-22 20:27:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15491 states, 15489 states have (on average 1.3660016786106268) internal successors, (21158), 15490 states have internal predecessors, (21158), 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) [2022-07-22 20:27:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15491 states to 15491 states and 21158 transitions. [2022-07-22 20:27:08,343 INFO L78 Accepts]: Start accepts. Automaton has 15491 states and 21158 transitions. Word has length 82 [2022-07-22 20:27:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:08,344 INFO L495 AbstractCegarLoop]: Abstraction has 15491 states and 21158 transitions. [2022-07-22 20:27:08,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2022-07-22 20:27:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 15491 states and 21158 transitions. [2022-07-22 20:27:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:27:08,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:08,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:08,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 20:27:08,345 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2022-07-22 20:27:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:08,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927171577] [2022-07-22 20:27:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:08,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927171577] [2022-07-22 20:27:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927171577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:27:08,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151119763] [2022-07-22 20:27:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:08,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:08,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:27:08,511 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) [2022-07-22 20:27:08,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 20:27:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:08,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 20:27:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:27:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:09,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:27:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:09,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151119763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:27:09,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:27:09,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 20:27:09,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321152493] [2022-07-22 20:27:09,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:27:09,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 20:27:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 20:27:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:27:09,464 INFO L87 Difference]: Start difference. First operand 15491 states and 21158 transitions. Second operand has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 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) [2022-07-22 20:27:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:12,051 INFO L93 Difference]: Finished difference Result 38349 states and 50704 transitions. [2022-07-22 20:27:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 20:27:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 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 83 [2022-07-22 20:27:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:12,090 INFO L225 Difference]: With dead ends: 38349 [2022-07-22 20:27:12,090 INFO L226 Difference]: Without dead ends: 32222 [2022-07-22 20:27:12,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-07-22 20:27:12,102 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 15543 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15543 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:12,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15543 Valid, 6536 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 20:27:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32222 states. [2022-07-22 20:27:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32222 to 23398. [2022-07-22 20:27:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23398 states, 23396 states have (on average 1.3259104120362455) internal successors, (31021), 23397 states have internal predecessors, (31021), 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) [2022-07-22 20:27:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23398 states to 23398 states and 31021 transitions. [2022-07-22 20:27:13,624 INFO L78 Accepts]: Start accepts. Automaton has 23398 states and 31021 transitions. Word has length 83 [2022-07-22 20:27:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 23398 states and 31021 transitions. [2022-07-22 20:27:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.857142857142858) internal successors, (186), 20 states have internal predecessors, (186), 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) [2022-07-22 20:27:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23398 states and 31021 transitions. [2022-07-22 20:27:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:27:13,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:13,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:13,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 20:27:13,843 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,SelfDestructingSolverStorable22 [2022-07-22 20:27:13,844 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1875749690, now seen corresponding path program 1 times [2022-07-22 20:27:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:13,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315745550] [2022-07-22 20:27:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:13,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315745550] [2022-07-22 20:27:13,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315745550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:27:13,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457251] [2022-07-22 20:27:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:13,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:27:13,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:27:13,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 20:27:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:14,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 20:27:14,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:27:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:14,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:27:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:15,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:27:15,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:27:15,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-22 20:27:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713119305] [2022-07-22 20:27:15,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:27:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 20:27:15,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 20:27:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-22 20:27:15,648 INFO L87 Difference]: Start difference. First operand 23398 states and 31021 transitions. Second operand has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 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) [2022-07-22 20:27:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:29,734 INFO L93 Difference]: Finished difference Result 107554 states and 138879 transitions. [2022-07-22 20:27:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 20:27:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 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 83 [2022-07-22 20:27:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:29,866 INFO L225 Difference]: With dead ends: 107554 [2022-07-22 20:27:29,867 INFO L226 Difference]: Without dead ends: 94412 [2022-07-22 20:27:29,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2150, Invalid=9622, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 20:27:29,894 INFO L413 NwaCegarLoop]: 1608 mSDtfsCounter, 15881 mSDsluCounter, 16406 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15881 SdHoareTripleChecker+Valid, 18014 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:29,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15881 Valid, 18014 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 20:27:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94412 states. [2022-07-22 20:27:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94412 to 48006. [2022-07-22 20:27:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48006 states, 48004 states have (on average 1.2826014498791767) internal successors, (61570), 48005 states have internal predecessors, (61570), 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) [2022-07-22 20:27:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48006 states to 48006 states and 61570 transitions. [2022-07-22 20:27:35,404 INFO L78 Accepts]: Start accepts. Automaton has 48006 states and 61570 transitions. Word has length 83 [2022-07-22 20:27:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:35,404 INFO L495 AbstractCegarLoop]: Abstraction has 48006 states and 61570 transitions. [2022-07-22 20:27:35,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 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) [2022-07-22 20:27:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 48006 states and 61570 transitions. [2022-07-22 20:27:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 20:27:35,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:35,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:35,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 20:27:35,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:35,624 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1855953112, now seen corresponding path program 1 times [2022-07-22 20:27:35,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900304609] [2022-07-22 20:27:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 20:27:35,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:35,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900304609] [2022-07-22 20:27:35,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900304609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:27:35,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:27:35,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:27:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367647447] [2022-07-22 20:27:35,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:27:35,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:27:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:27:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:27:35,782 INFO L87 Difference]: Start difference. First operand 48006 states and 61570 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-22 20:27:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:38,669 INFO L93 Difference]: Finished difference Result 70540 states and 89830 transitions. [2022-07-22 20:27:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 20:27:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 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 83 [2022-07-22 20:27:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:38,708 INFO L225 Difference]: With dead ends: 70540 [2022-07-22 20:27:38,708 INFO L226 Difference]: Without dead ends: 31689 [2022-07-22 20:27:38,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-22 20:27:38,730 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4607 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:38,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4607 Valid, 2980 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 20:27:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31689 states. [2022-07-22 20:27:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31689 to 31689. [2022-07-22 20:27:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31689 states, 31687 states have (on average 1.284091267712311) internal successors, (40689), 31688 states have internal predecessors, (40689), 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) [2022-07-22 20:27:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31689 states to 31689 states and 40689 transitions. [2022-07-22 20:27:41,999 INFO L78 Accepts]: Start accepts. Automaton has 31689 states and 40689 transitions. Word has length 83 [2022-07-22 20:27:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:27:41,999 INFO L495 AbstractCegarLoop]: Abstraction has 31689 states and 40689 transitions. [2022-07-22 20:27:41,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 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) [2022-07-22 20:27:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31689 states and 40689 transitions. [2022-07-22 20:27:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:27:42,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:27:42,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:27:42,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 20:27:42,001 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:27:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:27:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1741675261, now seen corresponding path program 1 times [2022-07-22 20:27:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:27:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498948983] [2022-07-22 20:27:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:27:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:42,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:27:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498948983] [2022-07-22 20:27:42,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498948983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 20:27:42,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832754154] [2022-07-22 20:27:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:27:42,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 20:27:42,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 20:27:42,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 20:27:42,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 20:27:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:27:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 20:27:42,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 20:27:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 20:27:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 20:27:43,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832754154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 20:27:43,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 20:27:43,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-22 20:27:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782032215] [2022-07-22 20:27:43,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 20:27:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 20:27:43,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:27:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 20:27:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-22 20:27:43,216 INFO L87 Difference]: Start difference. First operand 31689 states and 40689 transitions. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 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) [2022-07-22 20:27:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 20:27:56,578 INFO L93 Difference]: Finished difference Result 118234 states and 146045 transitions. [2022-07-22 20:27:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 20:27:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 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 84 [2022-07-22 20:27:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 20:27:56,728 INFO L225 Difference]: With dead ends: 118234 [2022-07-22 20:27:56,729 INFO L226 Difference]: Without dead ends: 99139 [2022-07-22 20:27:56,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 20:27:56,757 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 9333 mSDsluCounter, 4883 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9333 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 20:27:56,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9333 Valid, 6415 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 20:27:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99139 states. [2022-07-22 20:28:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99139 to 69269. [2022-07-22 20:28:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69269 states, 69267 states have (on average 1.2457880375936594) internal successors, (86292), 69268 states have internal predecessors, (86292), 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) [2022-07-22 20:28:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69269 states to 69269 states and 86292 transitions. [2022-07-22 20:28:05,461 INFO L78 Accepts]: Start accepts. Automaton has 69269 states and 86292 transitions. Word has length 84 [2022-07-22 20:28:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 20:28:05,461 INFO L495 AbstractCegarLoop]: Abstraction has 69269 states and 86292 transitions. [2022-07-22 20:28:05,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 20 states have internal predecessors, (200), 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) [2022-07-22 20:28:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 69269 states and 86292 transitions. [2022-07-22 20:28:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 20:28:05,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 20:28:05,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 20:28:05,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 20:28:05,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 20:28:05,681 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 20:28:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 20:28:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -307712581, now seen corresponding path program 1 times [2022-07-22 20:28:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 20:28:05,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112237461] [2022-07-22 20:28:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 20:28:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 20:28:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 20:28:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 20:28:05,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 20:28:05,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112237461] [2022-07-22 20:28:05,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112237461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 20:28:05,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 20:28:05,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 20:28:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542630699] [2022-07-22 20:28:05,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 20:28:05,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 20:28:05,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 20:28:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 20:28:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 20:28:05,728 INFO L87 Difference]: Start difference. First operand 69269 states and 86292 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 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)