./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_label01.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 e0c7c69d3788b9174ce50b7ab42b39214a13bc3eceec60ee173c8e1ad7db186a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:09:21,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:09:21,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:09:21,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:09:21,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:09:21,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:09:21,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:09:21,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:09:21,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:09:21,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:09:21,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:09:21,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:09:21,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:09:21,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:09:21,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:09:21,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:09:21,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:09:21,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:09:21,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:09:21,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:09:21,929 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:09:21,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:09:21,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:09:21,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:09:21,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:09:21,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:09:21,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:09:21,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:09:21,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:09:21,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:09:21,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:09:21,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:09:21,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:09:21,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:09:21,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:09:21,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:09:21,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:09:21,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:09:21,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:09:21,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:09:21,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:09:21,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:09:21,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:09:21,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:09:21,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:09:21,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:09:21,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:09:21,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:09:21,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:09:21,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:09:21,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:09:21,991 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:09:21,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:09:21,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:09:21,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:09:21,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:09:21,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:09:22,000 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:09:22,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:09:22,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:09:22,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:09:22,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:09:22,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:09:22,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:09:22,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:09:22,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:09:22,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:09:22,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:09:22,003 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:09:22,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:09:22,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:09:22,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0c7c69d3788b9174ce50b7ab42b39214a13bc3eceec60ee173c8e1ad7db186a [2022-07-12 09:09:22,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:09:22,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:09:22,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:09:22,258 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:09:22,258 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:09:22,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2022-07-12 09:09:22,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92d90ee4/23282fc1cb5f462697083a0abd27977a/FLAG1eb0c04ee [2022-07-12 09:09:23,009 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:09:23,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2022-07-12 09:09:23,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92d90ee4/23282fc1cb5f462697083a0abd27977a/FLAG1eb0c04ee [2022-07-12 09:09:23,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92d90ee4/23282fc1cb5f462697083a0abd27977a [2022-07-12 09:09:23,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:09:23,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:09:23,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:09:23,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:09:23,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:09:23,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:09:23" (1/1) ... [2022-07-12 09:09:23,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f940789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:23, skipping insertion in model container [2022-07-12 09:09:23,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:09:23" (1/1) ... [2022-07-12 09:09:23,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:09:23,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:09:23,731 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_label01.c[8712,8725] [2022-07-12 09:09:23,777 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_label01.c[14267,14280] [2022-07-12 09:09:24,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:09:24,376 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:09:24,411 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_label01.c[8712,8725] [2022-07-12 09:09:24,429 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_label01.c[14267,14280] [2022-07-12 09:09:24,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:09:24,825 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:09:24,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24 WrapperNode [2022-07-12 09:09:24,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:09:24,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:09:24,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:09:24,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:09:24,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:24,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,263 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5031 [2022-07-12 09:09:25,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:09:25,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:09:25,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:09:25,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:09:25,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:09:25,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:09:25,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:09:25,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:09:25,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (1/1) ... [2022-07-12 09:09:25,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:09:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:09:25,821 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) [2022-07-12 09:09:25,849 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 [2022-07-12 09:09:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:09:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:09:25,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:09:25,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:09:26,011 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:09:26,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:09:29,399 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:09:29,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:09:29,415 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:09:29,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:09:29 BoogieIcfgContainer [2022-07-12 09:09:29,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:09:29,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:09:29,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:09:29,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:09:29,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:09:23" (1/3) ... [2022-07-12 09:09:29,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:09:29, skipping insertion in model container [2022-07-12 09:09:29,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:09:24" (2/3) ... [2022-07-12 09:09:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662d254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:09:29, skipping insertion in model container [2022-07-12 09:09:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:09:29" (3/3) ... [2022-07-12 09:09:29,426 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label01.c [2022-07-12 09:09:29,439 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:09:29,439 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:09:29,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:09:29,506 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@205b45f2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@14119ea2 [2022-07-12 09:09:29,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:09:29,515 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) [2022-07-12 09:09:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:09:29,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:29,524 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] [2022-07-12 09:09:29,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2022-07-12 09:09:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:29,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298342475] [2022-07-12 09:09:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:29,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298342475] [2022-07-12 09:09:29,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298342475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:29,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:29,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:09:29,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196860393] [2022-07-12 09:09:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:29,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:09:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:09:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:09:29,710 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 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) [2022-07-12 09:09:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:29,788 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2022-07-12 09:09:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:09:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 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 [2022-07-12 09:09:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:29,808 INFO L225 Difference]: With dead ends: 1759 [2022-07-12 09:09:29,808 INFO L226 Difference]: Without dead ends: 829 [2022-07-12 09:09:29,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:09:29,818 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:09:29,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:09:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-12 09:09:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-12 09:09:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 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) [2022-07-12 09:09:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2022-07-12 09:09:29,902 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2022-07-12 09:09:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:29,902 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2022-07-12 09:09:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 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) [2022-07-12 09:09:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2022-07-12 09:09:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:09:29,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:29,905 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] [2022-07-12 09:09:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:09:29,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2022-07-12 09:09:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705522694] [2022-07-12 09:09:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705522694] [2022-07-12 09:09:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705522694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:30,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:09:30,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886451010] [2022-07-12 09:09:30,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:30,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:09:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:30,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:09:30,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:09:30,012 INFO L87 Difference]: Start difference. First operand 829 states and 1563 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) [2022-07-12 09:09:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:30,131 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2022-07-12 09:09:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 09:09:30,132 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 [2022-07-12 09:09:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:30,137 INFO L225 Difference]: With dead ends: 879 [2022-07-12 09:09:30,138 INFO L226 Difference]: Without dead ends: 829 [2022-07-12 09:09:30,138 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 [2022-07-12 09:09:30,140 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 [2022-07-12 09:09:30,140 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] [2022-07-12 09:09:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-12 09:09:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-12 09:09:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 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) [2022-07-12 09:09:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2022-07-12 09:09:30,182 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2022-07-12 09:09:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:30,183 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2022-07-12 09:09:30,183 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) [2022-07-12 09:09:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2022-07-12 09:09:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 09:09:30,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:30,185 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] [2022-07-12 09:09:30,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:09:30,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash 700328821, now seen corresponding path program 1 times [2022-07-12 09:09:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:30,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681981736] [2022-07-12 09:09:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:30,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681981736] [2022-07-12 09:09:30,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681981736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:30,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:30,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:09:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520341472] [2022-07-12 09:09:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:30,294 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-07-12 09:09:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:33,583 INFO L93 Difference]: Finished difference Result 2333 states and 4413 transitions. [2022-07-12 09:09:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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 48 [2022-07-12 09:09:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:33,590 INFO L225 Difference]: With dead ends: 2333 [2022-07-12 09:09:33,590 INFO L226 Difference]: Without dead ends: 1580 [2022-07-12 09:09:33,592 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 [2022-07-12 09:09:33,593 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 868 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:09:33,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 178 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 09:09:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-07-12 09:09:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2022-07-12 09:09:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1578 states have (on average 1.847275031685678) internal successors, (2915), 1579 states have internal predecessors, (2915), 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) [2022-07-12 09:09:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2915 transitions. [2022-07-12 09:09:33,629 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2915 transitions. Word has length 48 [2022-07-12 09:09:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:33,629 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 2915 transitions. [2022-07-12 09:09:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 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) [2022-07-12 09:09:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2915 transitions. [2022-07-12 09:09:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:09:33,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:33,632 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] [2022-07-12 09:09:33,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:09:33,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2022-07-12 09:09:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668436582] [2022-07-12 09:09:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:33,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:33,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:33,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668436582] [2022-07-12 09:09:33,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668436582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:33,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:33,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:33,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947696721] [2022-07-12 09:09:33,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:33,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:33,723 INFO L87 Difference]: Start difference. First operand 1580 states and 2915 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) [2022-07-12 09:09:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:33,856 INFO L93 Difference]: Finished difference Result 1948 states and 3491 transitions. [2022-07-12 09:09:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:09:33,856 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 [2022-07-12 09:09:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:33,865 INFO L225 Difference]: With dead ends: 1948 [2022-07-12 09:09:33,866 INFO L226 Difference]: Without dead ends: 1902 [2022-07-12 09:09:33,867 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 [2022-07-12 09:09:33,876 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:09:33,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:09:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-07-12 09:09:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1624. [2022-07-12 09:09:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1622 states have (on average 1.8397040690505548) internal successors, (2984), 1623 states have internal predecessors, (2984), 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) [2022-07-12 09:09:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2984 transitions. [2022-07-12 09:09:33,926 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2984 transitions. Word has length 52 [2022-07-12 09:09:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:33,928 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2984 transitions. [2022-07-12 09:09:33,928 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) [2022-07-12 09:09:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2984 transitions. [2022-07-12 09:09:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:09:33,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:33,935 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] [2022-07-12 09:09:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 09:09:33,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2022-07-12 09:09:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995284746] [2022-07-12 09:09:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:34,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995284746] [2022-07-12 09:09:34,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995284746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:34,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:34,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:34,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755460356] [2022-07-12 09:09:34,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:34,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:34,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:34,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:34,062 INFO L87 Difference]: Start difference. First operand 1624 states and 2984 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) [2022-07-12 09:09:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:34,108 INFO L93 Difference]: Finished difference Result 1793 states and 3247 transitions. [2022-07-12 09:09:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:34,109 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 [2022-07-12 09:09:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:34,116 INFO L225 Difference]: With dead ends: 1793 [2022-07-12 09:09:34,117 INFO L226 Difference]: Without dead ends: 1703 [2022-07-12 09:09:34,117 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 [2022-07-12 09:09:34,121 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 [2022-07-12 09:09:34,122 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] [2022-07-12 09:09:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-07-12 09:09:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1699. [2022-07-12 09:09:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8255745433117265) internal successors, (3098), 1698 states have internal predecessors, (3098), 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) [2022-07-12 09:09:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3098 transitions. [2022-07-12 09:09:34,168 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3098 transitions. Word has length 54 [2022-07-12 09:09:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:34,171 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 3098 transitions. [2022-07-12 09:09:34,171 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) [2022-07-12 09:09:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3098 transitions. [2022-07-12 09:09:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:09:34,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:34,174 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] [2022-07-12 09:09:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:09:34,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2022-07-12 09:09:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890670575] [2022-07-12 09:09:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890670575] [2022-07-12 09:09:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890670575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:34,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:34,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:34,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973563733] [2022-07-12 09:09:34,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:34,344 INFO L87 Difference]: Start difference. First operand 1699 states and 3098 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) [2022-07-12 09:09:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:34,472 INFO L93 Difference]: Finished difference Result 1866 states and 3354 transitions. [2022-07-12 09:09:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:09:34,472 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 [2022-07-12 09:09:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:34,481 INFO L225 Difference]: With dead ends: 1866 [2022-07-12 09:09:34,481 INFO L226 Difference]: Without dead ends: 1701 [2022-07-12 09:09:34,482 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 [2022-07-12 09:09:34,484 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 [2022-07-12 09:09:34,484 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] [2022-07-12 09:09:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-07-12 09:09:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1699. [2022-07-12 09:09:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1697 states have (on average 1.8243959929286977) internal successors, (3096), 1698 states have internal predecessors, (3096), 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) [2022-07-12 09:09:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3096 transitions. [2022-07-12 09:09:34,531 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3096 transitions. Word has length 54 [2022-07-12 09:09:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:34,531 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 3096 transitions. [2022-07-12 09:09:34,531 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) [2022-07-12 09:09:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3096 transitions. [2022-07-12 09:09:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:09:34,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:34,532 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] [2022-07-12 09:09:34,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:09:34,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2022-07-12 09:09:34,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:34,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410625053] [2022-07-12 09:09:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:34,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:34,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:34,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410625053] [2022-07-12 09:09:34,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410625053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:34,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:34,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410810800] [2022-07-12 09:09:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:34,595 INFO L87 Difference]: Start difference. First operand 1699 states and 3096 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) [2022-07-12 09:09:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:34,642 INFO L93 Difference]: Finished difference Result 2005 states and 3562 transitions. [2022-07-12 09:09:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:34,643 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 [2022-07-12 09:09:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:34,651 INFO L225 Difference]: With dead ends: 2005 [2022-07-12 09:09:34,652 INFO L226 Difference]: Without dead ends: 1840 [2022-07-12 09:09:34,654 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 [2022-07-12 09:09:34,655 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 [2022-07-12 09:09:34,655 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] [2022-07-12 09:09:34,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-07-12 09:09:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1838. [2022-07-12 09:09:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1836 states have (on average 1.7995642701525054) internal successors, (3304), 1837 states have internal predecessors, (3304), 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) [2022-07-12 09:09:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3304 transitions. [2022-07-12 09:09:34,712 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3304 transitions. Word has length 54 [2022-07-12 09:09:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:34,712 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 3304 transitions. [2022-07-12 09:09:34,712 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) [2022-07-12 09:09:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3304 transitions. [2022-07-12 09:09:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:09:34,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:34,714 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] [2022-07-12 09:09:34,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:09:34,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2022-07-12 09:09:34,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:34,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489639871] [2022-07-12 09:09:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489639871] [2022-07-12 09:09:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489639871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:34,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191968746] [2022-07-12 09:09:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:34,762 INFO L87 Difference]: Start difference. First operand 1838 states and 3304 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) [2022-07-12 09:09:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:34,853 INFO L93 Difference]: Finished difference Result 2398 states and 4146 transitions. [2022-07-12 09:09:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:34,855 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 [2022-07-12 09:09:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:34,862 INFO L225 Difference]: With dead ends: 2398 [2022-07-12 09:09:34,863 INFO L226 Difference]: Without dead ends: 2094 [2022-07-12 09:09:34,865 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 [2022-07-12 09:09:34,866 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 [2022-07-12 09:09:34,866 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] [2022-07-12 09:09:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2022-07-12 09:09:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2092. [2022-07-12 09:09:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2090 states have (on average 1.7588516746411482) internal successors, (3676), 2091 states have internal predecessors, (3676), 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) [2022-07-12 09:09:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3676 transitions. [2022-07-12 09:09:34,933 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3676 transitions. Word has length 54 [2022-07-12 09:09:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:34,934 INFO L495 AbstractCegarLoop]: Abstraction has 2092 states and 3676 transitions. [2022-07-12 09:09:34,935 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) [2022-07-12 09:09:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3676 transitions. [2022-07-12 09:09:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:09:34,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:34,937 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] [2022-07-12 09:09:34,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:09:34,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2022-07-12 09:09:34,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:34,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554271143] [2022-07-12 09:09:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:34,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:34,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554271143] [2022-07-12 09:09:34,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554271143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:34,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:34,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064190066] [2022-07-12 09:09:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:34,997 INFO L87 Difference]: Start difference. First operand 2092 states and 3676 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) [2022-07-12 09:09:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:35,076 INFO L93 Difference]: Finished difference Result 3112 states and 5182 transitions. [2022-07-12 09:09:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:35,077 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 [2022-07-12 09:09:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:35,086 INFO L225 Difference]: With dead ends: 3112 [2022-07-12 09:09:35,086 INFO L226 Difference]: Without dead ends: 2554 [2022-07-12 09:09:35,088 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 [2022-07-12 09:09:35,089 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 [2022-07-12 09:09:35,090 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] [2022-07-12 09:09:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-07-12 09:09:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2552. [2022-07-12 09:09:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.6988235294117646) internal successors, (4332), 2551 states have internal predecessors, (4332), 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) [2022-07-12 09:09:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4332 transitions. [2022-07-12 09:09:35,184 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4332 transitions. Word has length 54 [2022-07-12 09:09:35,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:35,184 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4332 transitions. [2022-07-12 09:09:35,185 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) [2022-07-12 09:09:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4332 transitions. [2022-07-12 09:09:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:09:35,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:35,185 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] [2022-07-12 09:09:35,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 09:09:35,186 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2022-07-12 09:09:35,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:35,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040213993] [2022-07-12 09:09:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:35,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:35,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040213993] [2022-07-12 09:09:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040213993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:35,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:35,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 09:09:35,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660612539] [2022-07-12 09:09:35,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:35,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 09:09:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 09:09:35,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:09:35,280 INFO L87 Difference]: Start difference. First operand 2552 states and 4332 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) [2022-07-12 09:09:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:35,520 INFO L93 Difference]: Finished difference Result 3322 states and 5433 transitions. [2022-07-12 09:09:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 09:09:35,520 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 [2022-07-12 09:09:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:35,532 INFO L225 Difference]: With dead ends: 3322 [2022-07-12 09:09:35,533 INFO L226 Difference]: Without dead ends: 3320 [2022-07-12 09:09:35,534 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 [2022-07-12 09:09:35,535 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 [2022-07-12 09:09:35,535 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] [2022-07-12 09:09:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2022-07-12 09:09:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2600. [2022-07-12 09:09:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2598 states have (on average 1.682832948421863) internal successors, (4372), 2599 states have internal predecessors, (4372), 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) [2022-07-12 09:09:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4372 transitions. [2022-07-12 09:09:35,656 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4372 transitions. Word has length 55 [2022-07-12 09:09:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:35,656 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 4372 transitions. [2022-07-12 09:09:35,657 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) [2022-07-12 09:09:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4372 transitions. [2022-07-12 09:09:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 09:09:35,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:35,658 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] [2022-07-12 09:09:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 09:09:35,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2022-07-12 09:09:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616970468] [2022-07-12 09:09:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616970468] [2022-07-12 09:09:35,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616970468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:35,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:35,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:35,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740252806] [2022-07-12 09:09:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:35,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:35,686 INFO L87 Difference]: Start difference. First operand 2600 states and 4372 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) [2022-07-12 09:09:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:35,852 INFO L93 Difference]: Finished difference Result 3695 states and 5962 transitions. [2022-07-12 09:09:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:35,852 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 [2022-07-12 09:09:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:35,867 INFO L225 Difference]: With dead ends: 3695 [2022-07-12 09:09:35,868 INFO L226 Difference]: Without dead ends: 3084 [2022-07-12 09:09:35,869 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 [2022-07-12 09:09:35,870 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 [2022-07-12 09:09:35,870 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] [2022-07-12 09:09:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-07-12 09:09:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3082. [2022-07-12 09:09:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3080 states have (on average 1.6383116883116884) internal successors, (5046), 3081 states have internal predecessors, (5046), 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) [2022-07-12 09:09:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 5046 transitions. [2022-07-12 09:09:36,025 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 5046 transitions. Word has length 56 [2022-07-12 09:09:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:36,025 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 5046 transitions. [2022-07-12 09:09:36,025 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) [2022-07-12 09:09:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 5046 transitions. [2022-07-12 09:09:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:09:36,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:36,027 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] [2022-07-12 09:09:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 09:09:36,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2022-07-12 09:09:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:36,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286283719] [2022-07-12 09:09:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 09:09:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286283719] [2022-07-12 09:09:36,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286283719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:36,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:36,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151060405] [2022-07-12 09:09:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:36,082 INFO L87 Difference]: Start difference. First operand 3082 states and 5046 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) [2022-07-12 09:09:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:36,702 INFO L93 Difference]: Finished difference Result 9588 states and 14287 transitions. [2022-07-12 09:09:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:09:36,703 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 [2022-07-12 09:09:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:36,725 INFO L225 Difference]: With dead ends: 9588 [2022-07-12 09:09:36,725 INFO L226 Difference]: Without dead ends: 8042 [2022-07-12 09:09:36,730 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 [2022-07-12 09:09:36,730 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 [2022-07-12 09:09:36,731 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] [2022-07-12 09:09:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2022-07-12 09:09:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 4626. [2022-07-12 09:09:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 4624 states have (on average 1.5618512110726643) internal successors, (7222), 4625 states have internal predecessors, (7222), 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) [2022-07-12 09:09:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7222 transitions. [2022-07-12 09:09:37,118 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7222 transitions. Word has length 79 [2022-07-12 09:09:37,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:37,119 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7222 transitions. [2022-07-12 09:09:37,120 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) [2022-07-12 09:09:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7222 transitions. [2022-07-12 09:09:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:09:37,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:37,122 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] [2022-07-12 09:09:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 09:09:37,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2022-07-12 09:09:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:37,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115279412] [2022-07-12 09:09:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 09:09:37,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:37,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115279412] [2022-07-12 09:09:37,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115279412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:37,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:37,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:37,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463784417] [2022-07-12 09:09:37,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:37,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:37,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:37,195 INFO L87 Difference]: Start difference. First operand 4626 states and 7222 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) [2022-07-12 09:09:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:37,867 INFO L93 Difference]: Finished difference Result 11132 states and 16463 transitions. [2022-07-12 09:09:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:09:37,867 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 [2022-07-12 09:09:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:37,887 INFO L225 Difference]: With dead ends: 11132 [2022-07-12 09:09:37,888 INFO L226 Difference]: Without dead ends: 9586 [2022-07-12 09:09:37,893 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 [2022-07-12 09:09:37,893 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 [2022-07-12 09:09:37,894 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] [2022-07-12 09:09:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2022-07-12 09:09:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 6946. [2022-07-12 09:09:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6946 states, 6944 states have (on average 1.507200460829493) internal successors, (10466), 6945 states have internal predecessors, (10466), 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) [2022-07-12 09:09:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6946 states to 6946 states and 10466 transitions. [2022-07-12 09:09:38,362 INFO L78 Accepts]: Start accepts. Automaton has 6946 states and 10466 transitions. Word has length 79 [2022-07-12 09:09:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:38,363 INFO L495 AbstractCegarLoop]: Abstraction has 6946 states and 10466 transitions. [2022-07-12 09:09:38,363 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) [2022-07-12 09:09:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6946 states and 10466 transitions. [2022-07-12 09:09:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:09:38,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:38,365 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] [2022-07-12 09:09:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 09:09:38,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2022-07-12 09:09:38,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:38,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641898381] [2022-07-12 09:09:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:09:38,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641898381] [2022-07-12 09:09:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641898381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:38,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:38,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750413887] [2022-07-12 09:09:38,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:38,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:38,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:38,428 INFO L87 Difference]: Start difference. First operand 6946 states and 10466 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) [2022-07-12 09:09:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:39,224 INFO L93 Difference]: Finished difference Result 12676 states and 18639 transitions. [2022-07-12 09:09:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:09:39,225 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 [2022-07-12 09:09:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:39,248 INFO L225 Difference]: With dead ends: 12676 [2022-07-12 09:09:39,248 INFO L226 Difference]: Without dead ends: 11130 [2022-07-12 09:09:39,255 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 [2022-07-12 09:09:39,256 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 [2022-07-12 09:09:39,257 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] [2022-07-12 09:09:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2022-07-12 09:09:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 8490. [2022-07-12 09:09:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4893967954759662) internal successors, (12642), 8489 states have internal predecessors, (12642), 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) [2022-07-12 09:09:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12642 transitions. [2022-07-12 09:09:39,978 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12642 transitions. Word has length 79 [2022-07-12 09:09:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:39,978 INFO L495 AbstractCegarLoop]: Abstraction has 8490 states and 12642 transitions. [2022-07-12 09:09:39,979 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) [2022-07-12 09:09:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12642 transitions. [2022-07-12 09:09:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 09:09:39,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:39,981 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] [2022-07-12 09:09:39,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 09:09:39,982 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2022-07-12 09:09:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520441830] [2022-07-12 09:09:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:39,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:40,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520441830] [2022-07-12 09:09:40,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520441830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:40,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:40,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797524460] [2022-07-12 09:09:40,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:40,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:40,027 INFO L87 Difference]: Start difference. First operand 8490 states and 12642 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) [2022-07-12 09:09:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:40,488 INFO L93 Difference]: Finished difference Result 13416 states and 19659 transitions. [2022-07-12 09:09:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:40,489 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 [2022-07-12 09:09:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:40,501 INFO L225 Difference]: With dead ends: 13416 [2022-07-12 09:09:40,502 INFO L226 Difference]: Without dead ends: 6462 [2022-07-12 09:09:40,512 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 [2022-07-12 09:09:40,514 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 [2022-07-12 09:09:40,514 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] [2022-07-12 09:09:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-07-12 09:09:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 6460. [2022-07-12 09:09:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6460 states, 6458 states have (on average 1.5156395168782906) internal successors, (9788), 6459 states have internal predecessors, (9788), 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) [2022-07-12 09:09:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6460 states to 6460 states and 9788 transitions. [2022-07-12 09:09:40,971 INFO L78 Accepts]: Start accepts. Automaton has 6460 states and 9788 transitions. Word has length 81 [2022-07-12 09:09:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:40,971 INFO L495 AbstractCegarLoop]: Abstraction has 6460 states and 9788 transitions. [2022-07-12 09:09:40,971 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) [2022-07-12 09:09:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6460 states and 9788 transitions. [2022-07-12 09:09:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 09:09:40,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:40,973 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] [2022-07-12 09:09:40,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 09:09:40,974 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2022-07-12 09:09:40,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:40,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518620201] [2022-07-12 09:09:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:40,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:09:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:41,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518620201] [2022-07-12 09:09:41,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518620201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:41,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:41,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:09:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900131877] [2022-07-12 09:09:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:41,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:09:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:09:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:09:41,032 INFO L87 Difference]: Start difference. First operand 6460 states and 9788 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) [2022-07-12 09:09:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:41,572 INFO L93 Difference]: Finished difference Result 10822 states and 16001 transitions. [2022-07-12 09:09:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:09:41,572 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 [2022-07-12 09:09:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:41,590 INFO L225 Difference]: With dead ends: 10822 [2022-07-12 09:09:41,590 INFO L226 Difference]: Without dead ends: 9732 [2022-07-12 09:09:41,594 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 [2022-07-12 09:09:41,594 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 [2022-07-12 09:09:41,595 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] [2022-07-12 09:09:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2022-07-12 09:09:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 7548. [2022-07-12 09:09:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7546 states have (on average 1.5006626027034191) internal successors, (11324), 7547 states have internal predecessors, (11324), 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) [2022-07-12 09:09:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 11324 transitions. [2022-07-12 09:09:41,991 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 11324 transitions. Word has length 81 [2022-07-12 09:09:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:41,991 INFO L495 AbstractCegarLoop]: Abstraction has 7548 states and 11324 transitions. [2022-07-12 09:09:41,991 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) [2022-07-12 09:09:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 11324 transitions. [2022-07-12 09:09:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 09:09:41,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:41,994 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] [2022-07-12 09:09:41,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 09:09:41,994 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:41,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2022-07-12 09:09:41,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:41,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132311574] [2022-07-12 09:09:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:42,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:42,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132311574] [2022-07-12 09:09:42,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132311574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:42,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:42,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314051470] [2022-07-12 09:09:42,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:42,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:42,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:42,039 INFO L87 Difference]: Start difference. First operand 7548 states and 11324 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) [2022-07-12 09:09:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:42,265 INFO L93 Difference]: Finished difference Result 10544 states and 15550 transitions. [2022-07-12 09:09:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:42,266 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 [2022-07-12 09:09:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:42,275 INFO L225 Difference]: With dead ends: 10544 [2022-07-12 09:09:42,275 INFO L226 Difference]: Without dead ends: 4558 [2022-07-12 09:09:42,283 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 [2022-07-12 09:09:42,283 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 [2022-07-12 09:09:42,284 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] [2022-07-12 09:09:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4558 states. [2022-07-12 09:09:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4558 to 4556. [2022-07-12 09:09:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4554 states have (on average 1.5494071146245059) internal successors, (7056), 4555 states have internal predecessors, (7056), 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) [2022-07-12 09:09:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 7056 transitions. [2022-07-12 09:09:42,590 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 7056 transitions. Word has length 82 [2022-07-12 09:09:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:42,590 INFO L495 AbstractCegarLoop]: Abstraction has 4556 states and 7056 transitions. [2022-07-12 09:09:42,590 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) [2022-07-12 09:09:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 7056 transitions. [2022-07-12 09:09:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 09:09:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:42,592 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] [2022-07-12 09:09:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 09:09:42,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2022-07-12 09:09:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:42,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764514053] [2022-07-12 09:09:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:42,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764514053] [2022-07-12 09:09:42,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764514053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:42,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:42,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:42,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742689470] [2022-07-12 09:09:42,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:42,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:42,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:42,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:42,655 INFO L87 Difference]: Start difference. First operand 4556 states and 7056 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) [2022-07-12 09:09:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:42,789 INFO L93 Difference]: Finished difference Result 6056 states and 9148 transitions. [2022-07-12 09:09:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:42,790 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 [2022-07-12 09:09:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:42,795 INFO L225 Difference]: With dead ends: 6056 [2022-07-12 09:09:42,795 INFO L226 Difference]: Without dead ends: 3062 [2022-07-12 09:09:42,799 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 [2022-07-12 09:09:42,800 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 [2022-07-12 09:09:42,800 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] [2022-07-12 09:09:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2022-07-12 09:09:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3060. [2022-07-12 09:09:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 3058 states have (on average 1.616742969260955) internal successors, (4944), 3059 states have internal predecessors, (4944), 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) [2022-07-12 09:09:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4944 transitions. [2022-07-12 09:09:42,942 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4944 transitions. Word has length 82 [2022-07-12 09:09:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:42,942 INFO L495 AbstractCegarLoop]: Abstraction has 3060 states and 4944 transitions. [2022-07-12 09:09:42,943 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) [2022-07-12 09:09:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4944 transitions. [2022-07-12 09:09:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 09:09:42,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:42,944 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] [2022-07-12 09:09:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 09:09:42,944 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2022-07-12 09:09:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687298104] [2022-07-12 09:09:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:42,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687298104] [2022-07-12 09:09:42,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687298104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:09:42,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:09:42,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:09:42,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995876767] [2022-07-12 09:09:42,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:09:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:09:42,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:09:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:09:42,978 INFO L87 Difference]: Start difference. First operand 3060 states and 4944 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) [2022-07-12 09:09:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:43,059 INFO L93 Difference]: Finished difference Result 3812 states and 5980 transitions. [2022-07-12 09:09:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:09:43,059 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 [2022-07-12 09:09:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:43,063 INFO L225 Difference]: With dead ends: 3812 [2022-07-12 09:09:43,063 INFO L226 Difference]: Without dead ends: 2314 [2022-07-12 09:09:43,066 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 [2022-07-12 09:09:43,066 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 [2022-07-12 09:09:43,067 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] [2022-07-12 09:09:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-07-12 09:09:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2312. [2022-07-12 09:09:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.687878787878788) internal successors, (3899), 2311 states have internal predecessors, (3899), 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) [2022-07-12 09:09:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 3899 transitions. [2022-07-12 09:09:43,147 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 3899 transitions. Word has length 82 [2022-07-12 09:09:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:43,148 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 3899 transitions. [2022-07-12 09:09:43,148 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) [2022-07-12 09:09:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 3899 transitions. [2022-07-12 09:09:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 09:09:43,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:43,149 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] [2022-07-12 09:09:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 09:09:43,149 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:43,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2022-07-12 09:09:43,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:43,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403509056] [2022-07-12 09:09:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:43,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:43,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403509056] [2022-07-12 09:09:43,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403509056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:09:43,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465525458] [2022-07-12 09:09:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:43,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:09:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:09:43,368 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) [2022-07-12 09:09:43,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:09:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:43,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 09:09:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:09:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:09:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:09:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:09:43,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465525458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:09:43,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:09:43,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-07-12 09:09:43,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124960516] [2022-07-12 09:09:43,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:09:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 09:09:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:43,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 09:09:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-12 09:09:43,995 INFO L87 Difference]: Start difference. First operand 2312 states and 3899 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) [2022-07-12 09:09:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:47,129 INFO L93 Difference]: Finished difference Result 11471 states and 16110 transitions. [2022-07-12 09:09:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-12 09:09:47,130 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 [2022-07-12 09:09:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:47,144 INFO L225 Difference]: With dead ends: 11471 [2022-07-12 09:09:47,144 INFO L226 Difference]: Without dead ends: 10721 [2022-07-12 09:09:47,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 09:09:47,151 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 11788 mSDsluCounter, 5285 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11788 SdHoareTripleChecker+Valid, 6832 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 09:09:47,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11788 Valid, 6832 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 09:09:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2022-07-12 09:09:47,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 7981. [2022-07-12 09:09:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7979 states have (on average 1.398295525755107) internal successors, (11157), 7980 states have internal predecessors, (11157), 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) [2022-07-12 09:09:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11157 transitions. [2022-07-12 09:09:47,816 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11157 transitions. Word has length 82 [2022-07-12 09:09:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:47,816 INFO L495 AbstractCegarLoop]: Abstraction has 7981 states and 11157 transitions. [2022-07-12 09:09:47,816 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) [2022-07-12 09:09:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11157 transitions. [2022-07-12 09:09:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 09:09:47,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:47,818 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] [2022-07-12 09:09:47,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 09:09:48,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:09:48,041 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2022-07-12 09:09:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:48,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939897596] [2022-07-12 09:09:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:48,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939897596] [2022-07-12 09:09:48,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939897596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:09:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301614580] [2022-07-12 09:09:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:09:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:09:48,223 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) [2022-07-12 09:09:48,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:09:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 09:09:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:09:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:48,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:09:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:49,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301614580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:09:49,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:09:49,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 09:09:49,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044532636] [2022-07-12 09:09:49,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:09:49,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 09:09:49,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 09:09:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-12 09:09:49,357 INFO L87 Difference]: Start difference. First operand 7981 states and 11157 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) [2022-07-12 09:09:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:09:51,952 INFO L93 Difference]: Finished difference Result 30839 states and 40703 transitions. [2022-07-12 09:09:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 09:09:51,952 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 [2022-07-12 09:09:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:09:51,982 INFO L225 Difference]: With dead ends: 30839 [2022-07-12 09:09:51,982 INFO L226 Difference]: Without dead ends: 24712 [2022-07-12 09:09:51,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-07-12 09:09:51,995 INFO L413 NwaCegarLoop]: 1534 mSDtfsCounter, 10859 mSDsluCounter, 5319 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10859 SdHoareTripleChecker+Valid, 6853 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 09:09:51,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10859 Valid, 6853 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 09:09:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24712 states. [2022-07-12 09:09:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24712 to 15888. [2022-07-12 09:09:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15886 states have (on average 1.3231776406899156) internal successors, (21020), 15887 states have internal predecessors, (21020), 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) [2022-07-12 09:09:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 21020 transitions. [2022-07-12 09:09:53,453 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 21020 transitions. Word has length 83 [2022-07-12 09:09:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:09:53,454 INFO L495 AbstractCegarLoop]: Abstraction has 15888 states and 21020 transitions. [2022-07-12 09:09:53,454 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) [2022-07-12 09:09:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 21020 transitions. [2022-07-12 09:09:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 09:09:53,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:09:53,456 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] [2022-07-12 09:09:53,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 09:09:53,679 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,SelfDestructingSolverStorable20 [2022-07-12 09:09:53,680 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:09:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:09:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1875749690, now seen corresponding path program 1 times [2022-07-12 09:09:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:09:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521508262] [2022-07-12 09:09:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:53,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:09:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:53,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:09:53,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521508262] [2022-07-12 09:09:53,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521508262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:09:53,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529685427] [2022-07-12 09:09:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:09:53,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:09:53,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:09:53,797 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) [2022-07-12 09:09:53,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 09:09:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:09:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 09:09:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:09:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:54,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:09:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:09:55,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529685427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:09:55,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:09:55,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2022-07-12 09:09:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860664573] [2022-07-12 09:09:55,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:09:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 09:09:55,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:09:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 09:09:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-07-12 09:09:55,727 INFO L87 Difference]: Start difference. First operand 15888 states and 21020 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) [2022-07-12 09:10:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:10:09,996 INFO L93 Difference]: Finished difference Result 100044 states and 128878 transitions. [2022-07-12 09:10:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 09:10:09,998 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 [2022-07-12 09:10:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:10:10,125 INFO L225 Difference]: With dead ends: 100044 [2022-07-12 09:10:10,126 INFO L226 Difference]: Without dead ends: 86902 [2022-07-12 09:10:10,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2150, Invalid=9622, Unknown=0, NotChecked=0, Total=11772 [2022-07-12 09:10:10,158 INFO L413 NwaCegarLoop]: 1608 mSDtfsCounter, 11930 mSDsluCounter, 16643 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11930 SdHoareTripleChecker+Valid, 18251 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:10:10,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11930 Valid, 18251 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 09:10:10,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86902 states. [2022-07-12 09:10:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86902 to 40496. [2022-07-12 09:10:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40496 states, 40494 states have (on average 1.2734973082431966) internal successors, (51569), 40495 states have internal predecessors, (51569), 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) [2022-07-12 09:10:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40496 states to 40496 states and 51569 transitions. [2022-07-12 09:10:15,455 INFO L78 Accepts]: Start accepts. Automaton has 40496 states and 51569 transitions. Word has length 83 [2022-07-12 09:10:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:10:15,456 INFO L495 AbstractCegarLoop]: Abstraction has 40496 states and 51569 transitions. [2022-07-12 09:10:15,456 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) [2022-07-12 09:10:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 40496 states and 51569 transitions. [2022-07-12 09:10:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 09:10:15,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:10:15,458 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] [2022-07-12 09:10:15,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 09:10:15,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:10:15,660 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:10:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:10:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1855953112, now seen corresponding path program 1 times [2022-07-12 09:10:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:10:15,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734080498] [2022-07-12 09:10:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:10:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:10:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:10:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 09:10:15,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:10:15,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734080498] [2022-07-12 09:10:15,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734080498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:10:15,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:10:15,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:10:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226859135] [2022-07-12 09:10:15,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:10:15,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:10:15,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:10:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:10:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:10:15,727 INFO L87 Difference]: Start difference. First operand 40496 states and 51569 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) [2022-07-12 09:10:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:10:18,894 INFO L93 Difference]: Finished difference Result 63030 states and 79829 transitions. [2022-07-12 09:10:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:10:18,895 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 [2022-07-12 09:10:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:10:18,925 INFO L225 Difference]: With dead ends: 63030 [2022-07-12 09:10:18,925 INFO L226 Difference]: Without dead ends: 24179 [2022-07-12 09:10:18,948 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 [2022-07-12 09:10:18,949 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:10:18,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:10:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24179 states. [2022-07-12 09:10:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24179 to 24179. [2022-07-12 09:10:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24179 states, 24177 states have (on average 1.2693055383215452) internal successors, (30688), 24178 states have internal predecessors, (30688), 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) [2022-07-12 09:10:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24179 states to 24179 states and 30688 transitions. [2022-07-12 09:10:21,872 INFO L78 Accepts]: Start accepts. Automaton has 24179 states and 30688 transitions. Word has length 83 [2022-07-12 09:10:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:10:21,872 INFO L495 AbstractCegarLoop]: Abstraction has 24179 states and 30688 transitions. [2022-07-12 09:10:21,872 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) [2022-07-12 09:10:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24179 states and 30688 transitions. [2022-07-12 09:10:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 09:10:21,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:10:21,874 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] [2022-07-12 09:10:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 09:10:21,874 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:10:21,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:10:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1741675261, now seen corresponding path program 1 times [2022-07-12 09:10:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:10:21,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111749608] [2022-07-12 09:10:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:10:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:10:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:10:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:10:22,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:10:22,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111749608] [2022-07-12 09:10:22,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111749608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:10:22,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29967285] [2022-07-12 09:10:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:10:22,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:10:22,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:10:22,002 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) [2022-07-12 09:10:22,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 09:10:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:10:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:10:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:10:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:10:22,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:10:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:10:23,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29967285] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:10:23,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:10:23,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 09:10:23,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817585410] [2022-07-12 09:10:23,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:10:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 09:10:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:10:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 09:10:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-12 09:10:23,129 INFO L87 Difference]: Start difference. First operand 24179 states and 30688 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) [2022-07-12 09:10:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:10:36,190 INFO L93 Difference]: Finished difference Result 110724 states and 136044 transitions. [2022-07-12 09:10:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 09:10:36,191 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 [2022-07-12 09:10:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:10:36,323 INFO L225 Difference]: With dead ends: 110724 [2022-07-12 09:10:36,324 INFO L226 Difference]: Without dead ends: 91629 [2022-07-12 09:10:36,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 09:10:36,350 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 14089 mSDsluCounter, 6318 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14089 SdHoareTripleChecker+Valid, 7850 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 09:10:36,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14089 Valid, 7850 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 09:10:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91629 states.