./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label03.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 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:51:26,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:51:26,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:51:26,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:51:26,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:51:26,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:51:26,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:51:26,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:51:26,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:51:26,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:51:26,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:51:26,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:51:26,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:51:26,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:51:26,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:51:26,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:51:26,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:51:27,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:51:27,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:51:27,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:51:27,008 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:51:27,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:51:27,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:51:27,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:51:27,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:51:27,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:51:27,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:51:27,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:51:27,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:51:27,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:51:27,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:51:27,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:51:27,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:51:27,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:51:27,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:51:27,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:51:27,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:51:27,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:51:27,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:51:27,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:51:27,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:51:27,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:51:27,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:51:27,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:51:27,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:51:27,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:51:27,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:51:27,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:51:27,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:51:27,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:51:27,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:51:27,061 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:51:27,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:51:27,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:51:27,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:51:27,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:51:27,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:51:27,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:51:27,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:51:27,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:51:27,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:51:27,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:51:27,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:51:27,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:51:27,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:51:27,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:51:27,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:51:27,065 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:51:27,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:51:27,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:51:27,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2022-07-22 12:51:27,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:51:27,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:51:27,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:51:27,251 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:51:27,252 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:51:27,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-22 12:51:27,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/408736394/a248abc5f6844cd89bfa2f92edd5ec29/FLAGc25878869 [2022-07-22 12:51:27,758 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:51:27,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2022-07-22 12:51:27,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/408736394/a248abc5f6844cd89bfa2f92edd5ec29/FLAGc25878869 [2022-07-22 12:51:28,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/408736394/a248abc5f6844cd89bfa2f92edd5ec29 [2022-07-22 12:51:28,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:51:28,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:51:28,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:51:28,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:51:28,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:51:28,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:28,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca5e4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28, skipping insertion in model container [2022-07-22 12:51:28,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:28,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:51:28,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:51:28,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-22 12:51:28,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:51:28,705 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:51:28,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2022-07-22 12:51:28,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:51:28,923 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:51:28,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28 WrapperNode [2022-07-22 12:51:28,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:51:28,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:51:28,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:51:28,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:51:28,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:28,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,162 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-22 12:51:29,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:51:29,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:51:29,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:51:29,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:51:29,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:51:29,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:51:29,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:51:29,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:51:29,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (1/1) ... [2022-07-22 12:51:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:51:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:51:29,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 12:51:29,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 12:51:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:51:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:51:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:51:29,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:51:29,689 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:51:29,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:51:32,002 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:51:32,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:51:32,014 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:51:32,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:51:32 BoogieIcfgContainer [2022-07-22 12:51:32,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:51:32,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:51:32,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:51:32,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:51:32,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:51:28" (1/3) ... [2022-07-22 12:51:32,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa0bf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:51:32, skipping insertion in model container [2022-07-22 12:51:32,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:51:28" (2/3) ... [2022-07-22 12:51:32,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa0bf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:51:32, skipping insertion in model container [2022-07-22 12:51:32,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:51:32" (3/3) ... [2022-07-22 12:51:32,024 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2022-07-22 12:51:32,034 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:51:32,034 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:51:32,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:51:32,103 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@132d20ba, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19c418fc [2022-07-22 12:51:32,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:51:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 12:51:32,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:32,126 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] [2022-07-22 12:51:32,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2022-07-22 12:51:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:32,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634349495] [2022-07-22 12:51:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:32,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:32,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634349495] [2022-07-22 12:51:32,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634349495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:32,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:32,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428532404] [2022-07-22 12:51:32,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:32,397 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:34,710 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-07-22 12:51:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-07-22 12:51:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:34,726 INFO L225 Difference]: With dead ends: 1644 [2022-07-22 12:51:34,726 INFO L226 Difference]: Without dead ends: 977 [2022-07-22 12:51:34,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:34,732 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:34,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:51:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-07-22 12:51:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-07-22 12:51:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-07-22 12:51:34,788 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2022-07-22 12:51:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:34,789 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-07-22 12:51:34,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:34,791 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-07-22 12:51:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 12:51:34,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:34,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:34,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:51:34,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:34,795 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2022-07-22 12:51:34,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:34,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146796798] [2022-07-22 12:51:34,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:34,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146796798] [2022-07-22 12:51:34,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146796798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:34,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:34,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313459217] [2022-07-22 12:51:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:34,928 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:36,949 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-07-22 12:51:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-07-22 12:51:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:36,961 INFO L225 Difference]: With dead ends: 2813 [2022-07-22 12:51:36,961 INFO L226 Difference]: Without dead ends: 1844 [2022-07-22 12:51:36,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:36,964 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:36,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 12:51:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-22 12:51:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-07-22 12:51:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-07-22 12:51:36,991 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2022-07-22 12:51:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:36,991 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-07-22 12:51:36,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-07-22 12:51:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 12:51:36,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:36,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:51:36,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2022-07-22 12:51:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896801590] [2022-07-22 12:51:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:36,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:37,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896801590] [2022-07-22 12:51:37,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896801590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:37,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:37,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:37,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731905195] [2022-07-22 12:51:37,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:37,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:37,133 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:38,896 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2022-07-22 12:51:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-07-22 12:51:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:38,904 INFO L225 Difference]: With dead ends: 4552 [2022-07-22 12:51:38,904 INFO L226 Difference]: Without dead ends: 2713 [2022-07-22 12:51:38,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:38,907 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:38,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 12:51:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-07-22 12:51:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-07-22 12:51:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2022-07-22 12:51:38,959 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2022-07-22 12:51:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:38,961 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2022-07-22 12:51:38,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2022-07-22 12:51:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-22 12:51:38,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:38,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:38,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:51:38,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2022-07-22 12:51:38,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:38,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469643324] [2022-07-22 12:51:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 12:51:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:39,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469643324] [2022-07-22 12:51:39,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469643324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:39,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:39,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:51:39,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271235622] [2022-07-22 12:51:39,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:39,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:39,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:39,110 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:40,705 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2022-07-22 12:51:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 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 188 [2022-07-22 12:51:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:40,718 INFO L225 Difference]: With dead ends: 7984 [2022-07-22 12:51:40,718 INFO L226 Difference]: Without dead ends: 4421 [2022-07-22 12:51:40,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:40,722 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:40,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-07-22 12:51:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2022-07-22 12:51:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2022-07-22 12:51:40,762 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2022-07-22 12:51:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:40,763 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2022-07-22 12:51:40,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2022-07-22 12:51:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-22 12:51:40,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:40,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:51:40,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:40,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2022-07-22 12:51:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:40,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48089201] [2022-07-22 12:51:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48089201] [2022-07-22 12:51:40,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48089201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:40,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:40,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291595129] [2022-07-22 12:51:40,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:40,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:40,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:40,877 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:42,376 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2022-07-22 12:51:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:42,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2022-07-22 12:51:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:42,393 INFO L225 Difference]: With dead ends: 9273 [2022-07-22 12:51:42,393 INFO L226 Difference]: Without dead ends: 5704 [2022-07-22 12:51:42,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:42,404 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:42,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:51:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2022-07-22 12:51:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2022-07-22 12:51:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2022-07-22 12:51:42,489 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2022-07-22 12:51:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:42,490 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2022-07-22 12:51:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2022-07-22 12:51:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-22 12:51:42,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:42,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:42,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:51:42,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2022-07-22 12:51:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:42,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397782528] [2022-07-22 12:51:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:51:42,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:42,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397782528] [2022-07-22 12:51:42,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397782528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:42,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:42,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:42,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58654436] [2022-07-22 12:51:42,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:42,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:42,579 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:44,174 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2022-07-22 12:51:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 203 [2022-07-22 12:51:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:44,194 INFO L225 Difference]: With dead ends: 14376 [2022-07-22 12:51:44,195 INFO L226 Difference]: Without dead ends: 8673 [2022-07-22 12:51:44,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:44,204 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 402 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2022-07-22 12:51:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2022-07-22 12:51:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2022-07-22 12:51:44,281 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2022-07-22 12:51:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:44,282 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2022-07-22 12:51:44,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2022-07-22 12:51:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-22 12:51:44,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:44,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:44,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:51:44,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:44,286 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2022-07-22 12:51:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:44,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862840100] [2022-07-22 12:51:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:51:44,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:44,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862840100] [2022-07-22 12:51:44,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862840100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:44,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:44,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:44,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083862510] [2022-07-22 12:51:44,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:44,411 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:46,088 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2022-07-22 12:51:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 281 [2022-07-22 12:51:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:46,110 INFO L225 Difference]: With dead ends: 13935 [2022-07-22 12:51:46,110 INFO L226 Difference]: Without dead ends: 7832 [2022-07-22 12:51:46,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:46,117 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:46,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:51:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2022-07-22 12:51:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2022-07-22 12:51:46,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2022-07-22 12:51:46,202 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2022-07-22 12:51:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:46,203 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2022-07-22 12:51:46,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2022-07-22 12:51:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-22 12:51:46,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:46,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:51:46,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:51:46,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2022-07-22 12:51:46,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:46,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295287957] [2022-07-22 12:51:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:51:46,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:46,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295287957] [2022-07-22 12:51:46,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295287957] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:46,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:46,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493554135] [2022-07-22 12:51:46,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:46,313 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:47,748 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2022-07-22 12:51:47,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 286 [2022-07-22 12:51:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:47,775 INFO L225 Difference]: With dead ends: 19038 [2022-07-22 12:51:47,775 INFO L226 Difference]: Without dead ends: 11213 [2022-07-22 12:51:47,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:47,783 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:47,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:51:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2022-07-22 12:51:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2022-07-22 12:51:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2022-07-22 12:51:47,879 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2022-07-22 12:51:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:47,880 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2022-07-22 12:51:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2022-07-22 12:51:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-22 12:51:47,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:47,884 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:51:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:51:47,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2022-07-22 12:51:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:47,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045324459] [2022-07-22 12:51:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:51:47,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:47,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045324459] [2022-07-22 12:51:47,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045324459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:51:47,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:51:47,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:51:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33925772] [2022-07-22 12:51:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:51:47,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:51:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:47,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:51:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:47,977 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:51:49,563 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2022-07-22 12:51:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:51:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 304 [2022-07-22 12:51:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:51:49,597 INFO L225 Difference]: With dead ends: 24567 [2022-07-22 12:51:49,597 INFO L226 Difference]: Without dead ends: 13774 [2022-07-22 12:51:49,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:51:49,606 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:51:49,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:51:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2022-07-22 12:51:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2022-07-22 12:51:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2022-07-22 12:51:49,729 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2022-07-22 12:51:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:51:49,732 INFO L495 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2022-07-22 12:51:49,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:51:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2022-07-22 12:51:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-07-22 12:51:49,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:51:49,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:51:49,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:51:49,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:51:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:51:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2022-07-22 12:51:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:51:49,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28732021] [2022-07-22 12:51:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:51:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:51:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:51:49,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28732021] [2022-07-22 12:51:49,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28732021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:51:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863920404] [2022-07-22 12:51:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:51:49,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:51:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:51:49,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:51:49,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:51:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:51:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:51:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:51:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 12:51:50,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:51:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-22 12:51:51,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863920404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:51:51,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:51:51,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-22 12:51:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195131052] [2022-07-22 12:51:51,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:51:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:51:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:51:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:51:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:51:51,201 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:04,245 INFO L93 Difference]: Finished difference Result 72324 states and 82154 transitions. [2022-07-22 12:52:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 12:52:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 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 309 [2022-07-22 12:52:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:04,400 INFO L225 Difference]: With dead ends: 72324 [2022-07-22 12:52:04,400 INFO L226 Difference]: Without dead ends: 55574 [2022-07-22 12:52:04,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-07-22 12:52:04,412 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 12615 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 14182 mSolverCounterSat, 2714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12615 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 16896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2714 IncrementalHoareTripleChecker+Valid, 14182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:04,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12615 Valid, 584 Invalid, 16896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2714 Valid, 14182 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-07-22 12:52:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55574 states. [2022-07-22 12:52:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55574 to 45745. [2022-07-22 12:52:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45745 states, 45744 states have (on average 1.1340066456803077) internal successors, (51874), 45744 states have internal predecessors, (51874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45745 states to 45745 states and 51874 transitions. [2022-07-22 12:52:04,899 INFO L78 Accepts]: Start accepts. Automaton has 45745 states and 51874 transitions. Word has length 309 [2022-07-22 12:52:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:04,900 INFO L495 AbstractCegarLoop]: Abstraction has 45745 states and 51874 transitions. [2022-07-22 12:52:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45745 states and 51874 transitions. [2022-07-22 12:52:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-22 12:52:04,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:04,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:04,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:52:05,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 12:52:05,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1219629045, now seen corresponding path program 1 times [2022-07-22 12:52:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153650373] [2022-07-22 12:52:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153650373] [2022-07-22 12:52:05,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153650373] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:05,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:05,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124376494] [2022-07-22 12:52:05,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:05,328 INFO L87 Difference]: Start difference. First operand 45745 states and 51874 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:06,910 INFO L93 Difference]: Finished difference Result 89355 states and 101386 transitions. [2022-07-22 12:52:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:06,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 336 [2022-07-22 12:52:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:06,964 INFO L225 Difference]: With dead ends: 89355 [2022-07-22 12:52:06,965 INFO L226 Difference]: Without dead ends: 44037 [2022-07-22 12:52:06,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:06,998 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:06,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 736 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:52:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44037 states. [2022-07-22 12:52:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44037 to 43610. [2022-07-22 12:52:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43610 states, 43609 states have (on average 1.1010341901900984) internal successors, (48015), 43609 states have internal predecessors, (48015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43610 states to 43610 states and 48015 transitions. [2022-07-22 12:52:07,559 INFO L78 Accepts]: Start accepts. Automaton has 43610 states and 48015 transitions. Word has length 336 [2022-07-22 12:52:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:07,560 INFO L495 AbstractCegarLoop]: Abstraction has 43610 states and 48015 transitions. [2022-07-22 12:52:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43610 states and 48015 transitions. [2022-07-22 12:52:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-07-22 12:52:07,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:07,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:07,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:52:07,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:07,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1217593932, now seen corresponding path program 1 times [2022-07-22 12:52:07,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:07,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138515237] [2022-07-22 12:52:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-22 12:52:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:07,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138515237] [2022-07-22 12:52:07,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138515237] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:07,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:07,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691693586] [2022-07-22 12:52:07,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:07,695 INFO L87 Difference]: Start difference. First operand 43610 states and 48015 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:09,653 INFO L93 Difference]: Finished difference Result 110697 states and 121863 transitions. [2022-07-22 12:52:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 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 396 [2022-07-22 12:52:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:09,733 INFO L225 Difference]: With dead ends: 110697 [2022-07-22 12:52:09,734 INFO L226 Difference]: Without dead ends: 67074 [2022-07-22 12:52:09,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:09,761 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 475 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:09,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 212 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:52:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67074 states. [2022-07-22 12:52:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67074 to 64910. [2022-07-22 12:52:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64910 states, 64909 states have (on average 1.0915589517632378) internal successors, (70852), 64909 states have internal predecessors, (70852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64910 states to 64910 states and 70852 transitions. [2022-07-22 12:52:10,514 INFO L78 Accepts]: Start accepts. Automaton has 64910 states and 70852 transitions. Word has length 396 [2022-07-22 12:52:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:10,514 INFO L495 AbstractCegarLoop]: Abstraction has 64910 states and 70852 transitions. [2022-07-22 12:52:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 64910 states and 70852 transitions. [2022-07-22 12:52:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-07-22 12:52:10,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:10,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:10,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:52:10,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2020271132, now seen corresponding path program 1 times [2022-07-22 12:52:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386195878] [2022-07-22 12:52:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:10,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-07-22 12:52:10,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:10,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386195878] [2022-07-22 12:52:10,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386195878] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:10,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:10,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038904989] [2022-07-22 12:52:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:10,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:10,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:10,644 INFO L87 Difference]: Start difference. First operand 64910 states and 70852 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:11,979 INFO L93 Difference]: Finished difference Result 126827 states and 138388 transitions. [2022-07-22 12:52:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 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 455 [2022-07-22 12:52:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:12,074 INFO L225 Difference]: With dead ends: 126827 [2022-07-22 12:52:12,074 INFO L226 Difference]: Without dead ends: 62343 [2022-07-22 12:52:12,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:12,101 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 637 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:12,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 102 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 12:52:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62343 states. [2022-07-22 12:52:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62343 to 62332. [2022-07-22 12:52:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62332 states, 62331 states have (on average 1.0897306316279218) internal successors, (67924), 62331 states have internal predecessors, (67924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62332 states to 62332 states and 67924 transitions. [2022-07-22 12:52:12,755 INFO L78 Accepts]: Start accepts. Automaton has 62332 states and 67924 transitions. Word has length 455 [2022-07-22 12:52:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:12,756 INFO L495 AbstractCegarLoop]: Abstraction has 62332 states and 67924 transitions. [2022-07-22 12:52:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 62332 states and 67924 transitions. [2022-07-22 12:52:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-07-22 12:52:12,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:12,765 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:52:12,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1958053970, now seen corresponding path program 1 times [2022-07-22 12:52:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028139207] [2022-07-22 12:52:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:12,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-22 12:52:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028139207] [2022-07-22 12:52:13,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028139207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:13,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:13,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102859499] [2022-07-22 12:52:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:13,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:13,026 INFO L87 Difference]: Start difference. First operand 62332 states and 67924 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:15,484 INFO L93 Difference]: Finished difference Result 140024 states and 152285 transitions. [2022-07-22 12:52:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 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 495 [2022-07-22 12:52:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:15,569 INFO L225 Difference]: With dead ends: 140024 [2022-07-22 12:52:15,569 INFO L226 Difference]: Without dead ends: 77693 [2022-07-22 12:52:15,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:15,604 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 893 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:15,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 253 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 12:52:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77693 states. [2022-07-22 12:52:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77693 to 59337. [2022-07-22 12:52:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59337 states, 59336 states have (on average 1.082361466900364) internal successors, (64223), 59336 states have internal predecessors, (64223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59337 states to 59337 states and 64223 transitions. [2022-07-22 12:52:16,420 INFO L78 Accepts]: Start accepts. Automaton has 59337 states and 64223 transitions. Word has length 495 [2022-07-22 12:52:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:16,420 INFO L495 AbstractCegarLoop]: Abstraction has 59337 states and 64223 transitions. [2022-07-22 12:52:16,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59337 states and 64223 transitions. [2022-07-22 12:52:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-07-22 12:52:16,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:16,430 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:16,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:52:16,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash -564339835, now seen corresponding path program 1 times [2022-07-22 12:52:16,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:16,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463137841] [2022-07-22 12:52:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 12:52:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463137841] [2022-07-22 12:52:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463137841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050130811] [2022-07-22 12:52:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:16,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:16,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:52:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:16,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:52:16,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 414 proven. 82 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 12:52:17,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:52:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 12:52:17,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050130811] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:17,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:52:17,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-22 12:52:17,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516457476] [2022-07-22 12:52:17,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:17,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:17,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:17,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:52:17,494 INFO L87 Difference]: Start difference. First operand 59337 states and 64223 transitions. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:20,494 INFO L93 Difference]: Finished difference Result 147196 states and 159116 transitions. [2022-07-22 12:52:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 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 504 [2022-07-22 12:52:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:20,586 INFO L225 Difference]: With dead ends: 147196 [2022-07-22 12:52:20,586 INFO L226 Difference]: Without dead ends: 88286 [2022-07-22 12:52:20,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1003 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:52:20,597 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 818 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:20,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 107 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:52:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88286 states. [2022-07-22 12:52:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88286 to 83986. [2022-07-22 12:52:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83986 states, 83985 states have (on average 1.0732868964696076) internal successors, (90140), 83985 states have internal predecessors, (90140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83986 states to 83986 states and 90140 transitions. [2022-07-22 12:52:21,622 INFO L78 Accepts]: Start accepts. Automaton has 83986 states and 90140 transitions. Word has length 504 [2022-07-22 12:52:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:21,623 INFO L495 AbstractCegarLoop]: Abstraction has 83986 states and 90140 transitions. [2022-07-22 12:52:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83986 states and 90140 transitions. [2022-07-22 12:52:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-22 12:52:21,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:21,632 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:21,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:52:21,839 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,SelfDestructingSolverStorable14 [2022-07-22 12:52:21,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1515115607, now seen corresponding path program 1 times [2022-07-22 12:52:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782970096] [2022-07-22 12:52:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 715 proven. 72 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-22 12:52:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:22,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782970096] [2022-07-22 12:52:22,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782970096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006116268] [2022-07-22 12:52:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:22,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:22,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:22,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:52:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:52:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 547 proven. 216 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-07-22 12:52:23,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:52:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-07-22 12:52:23,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006116268] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:23,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:52:23,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2022-07-22 12:52:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155320394] [2022-07-22 12:52:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:52:23,348 INFO L87 Difference]: Start difference. First operand 83986 states and 90140 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:25,519 INFO L93 Difference]: Finished difference Result 177762 states and 190553 transitions. [2022-07-22 12:52:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:25,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 513 [2022-07-22 12:52:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:25,626 INFO L225 Difference]: With dead ends: 177762 [2022-07-22 12:52:25,626 INFO L226 Difference]: Without dead ends: 94203 [2022-07-22 12:52:25,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:52:25,674 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 388 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:25,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 765 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 12:52:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94203 states. [2022-07-22 12:52:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94203 to 90357. [2022-07-22 12:52:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90357 states, 90356 states have (on average 1.0645668245606268) internal successors, (96190), 90356 states have internal predecessors, (96190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90357 states to 90357 states and 96190 transitions. [2022-07-22 12:52:26,717 INFO L78 Accepts]: Start accepts. Automaton has 90357 states and 96190 transitions. Word has length 513 [2022-07-22 12:52:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:26,717 INFO L495 AbstractCegarLoop]: Abstraction has 90357 states and 96190 transitions. [2022-07-22 12:52:26,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 90357 states and 96190 transitions. [2022-07-22 12:52:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-07-22 12:52:26,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:26,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:52:26,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:52:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:26,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash 589170808, now seen corresponding path program 1 times [2022-07-22 12:52:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561284476] [2022-07-22 12:52:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 793 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-22 12:52:27,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:27,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561284476] [2022-07-22 12:52:27,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561284476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:27,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:27,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:27,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942605268] [2022-07-22 12:52:27,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:27,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:27,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:27,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:27,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:27,287 INFO L87 Difference]: Start difference. First operand 90357 states and 96190 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:30,234 INFO L93 Difference]: Finished difference Result 214793 states and 228199 transitions. [2022-07-22 12:52:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-07-22 12:52:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:30,367 INFO L225 Difference]: With dead ends: 214793 [2022-07-22 12:52:30,367 INFO L226 Difference]: Without dead ends: 124863 [2022-07-22 12:52:30,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:30,417 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 840 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:30,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 186 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:52:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124863 states. [2022-07-22 12:52:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124863 to 117625. [2022-07-22 12:52:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117625 states, 117624 states have (on average 1.0620536625178536) internal successors, (124923), 117624 states have internal predecessors, (124923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117625 states to 117625 states and 124923 transitions. [2022-07-22 12:52:31,961 INFO L78 Accepts]: Start accepts. Automaton has 117625 states and 124923 transitions. Word has length 519 [2022-07-22 12:52:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:31,961 INFO L495 AbstractCegarLoop]: Abstraction has 117625 states and 124923 transitions. [2022-07-22 12:52:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 117625 states and 124923 transitions. [2022-07-22 12:52:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-07-22 12:52:31,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:31,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:52:31,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:52:31,973 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1068627681, now seen corresponding path program 1 times [2022-07-22 12:52:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:31,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143656666] [2022-07-22 12:52:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:31,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 750 proven. 89 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-22 12:52:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143656666] [2022-07-22 12:52:32,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143656666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312694490] [2022-07-22 12:52:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:32,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:32,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:32,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:52:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:32,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:52:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 952 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-22 12:52:32,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:52:32,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312694490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:32,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:52:32,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 12:52:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009914265] [2022-07-22 12:52:32,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:32,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:52:32,961 INFO L87 Difference]: Start difference. First operand 117625 states and 124923 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:35,564 INFO L93 Difference]: Finished difference Result 247602 states and 262833 transitions. [2022-07-22 12:52:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 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 530 [2022-07-22 12:52:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:35,704 INFO L225 Difference]: With dead ends: 247602 [2022-07-22 12:52:35,705 INFO L226 Difference]: Without dead ends: 130404 [2022-07-22 12:52:35,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:52:35,764 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 758 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:35,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 308 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 12:52:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130404 states. [2022-07-22 12:52:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130404 to 126991. [2022-07-22 12:52:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126991 states, 126990 states have (on average 1.0588944011339476) internal successors, (134469), 126990 states have internal predecessors, (134469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126991 states to 126991 states and 134469 transitions. [2022-07-22 12:52:37,485 INFO L78 Accepts]: Start accepts. Automaton has 126991 states and 134469 transitions. Word has length 530 [2022-07-22 12:52:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:37,485 INFO L495 AbstractCegarLoop]: Abstraction has 126991 states and 134469 transitions. [2022-07-22 12:52:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 126991 states and 134469 transitions. [2022-07-22 12:52:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-07-22 12:52:37,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:37,498 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:37,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 12:52:37,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 12:52:37,699 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1090391391, now seen corresponding path program 1 times [2022-07-22 12:52:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097487071] [2022-07-22 12:52:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 12:52:37,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:37,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097487071] [2022-07-22 12:52:37,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097487071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:37,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:37,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:37,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877677750] [2022-07-22 12:52:37,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:37,888 INFO L87 Difference]: Start difference. First operand 126991 states and 134469 transitions. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:41,189 INFO L93 Difference]: Finished difference Result 291895 states and 308533 transitions. [2022-07-22 12:52:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 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 564 [2022-07-22 12:52:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:41,390 INFO L225 Difference]: With dead ends: 291895 [2022-07-22 12:52:41,390 INFO L226 Difference]: Without dead ends: 165331 [2022-07-22 12:52:41,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:41,455 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 779 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:41,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 226 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:52:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165331 states. [2022-07-22 12:52:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165331 to 158092. [2022-07-22 12:52:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158092 states, 158091 states have (on average 1.0550821994926973) internal successors, (166799), 158091 states have internal predecessors, (166799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158092 states to 158092 states and 166799 transitions. [2022-07-22 12:52:43,658 INFO L78 Accepts]: Start accepts. Automaton has 158092 states and 166799 transitions. Word has length 564 [2022-07-22 12:52:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:43,658 INFO L495 AbstractCegarLoop]: Abstraction has 158092 states and 166799 transitions. [2022-07-22 12:52:43,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 158092 states and 166799 transitions. [2022-07-22 12:52:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-07-22 12:52:43,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:43,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:43,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:52:43,669 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 345832821, now seen corresponding path program 1 times [2022-07-22 12:52:43,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:43,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4432547] [2022-07-22 12:52:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:43,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-07-22 12:52:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4432547] [2022-07-22 12:52:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4432547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:44,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:44,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:52:44,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775816865] [2022-07-22 12:52:44,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:44,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:52:44,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:52:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:52:44,124 INFO L87 Difference]: Start difference. First operand 158092 states and 166799 transitions. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:48,489 INFO L93 Difference]: Finished difference Result 391579 states and 412382 transitions. [2022-07-22 12:52:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 12:52:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 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 569 [2022-07-22 12:52:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:48,858 INFO L225 Difference]: With dead ends: 391579 [2022-07-22 12:52:48,858 INFO L226 Difference]: Without dead ends: 231362 [2022-07-22 12:52:48,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:52:48,947 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1356 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:48,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 255 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:52:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231362 states. [2022-07-22 12:52:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231362 to 218542. [2022-07-22 12:52:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218542 states, 218541 states have (on average 1.0507090202753717) internal successors, (229623), 218541 states have internal predecessors, (229623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218542 states to 218542 states and 229623 transitions. [2022-07-22 12:52:52,004 INFO L78 Accepts]: Start accepts. Automaton has 218542 states and 229623 transitions. Word has length 569 [2022-07-22 12:52:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:52,005 INFO L495 AbstractCegarLoop]: Abstraction has 218542 states and 229623 transitions. [2022-07-22 12:52:52,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 218542 states and 229623 transitions. [2022-07-22 12:52:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-07-22 12:52:52,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:52,021 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:52,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:52:52,022 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash -927520867, now seen corresponding path program 1 times [2022-07-22 12:52:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138311133] [2022-07-22 12:52:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-22 12:52:52,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138311133] [2022-07-22 12:52:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138311133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:52,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:52,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:52,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774093051] [2022-07-22 12:52:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:52,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:52,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:52,502 INFO L87 Difference]: Start difference. First operand 218542 states and 229623 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:55,393 INFO L93 Difference]: Finished difference Result 453684 states and 477155 transitions. [2022-07-22 12:52:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 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 586 [2022-07-22 12:52:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:55,708 INFO L225 Difference]: With dead ends: 453684 [2022-07-22 12:52:55,709 INFO L226 Difference]: Without dead ends: 235144 [2022-07-22 12:52:55,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:55,813 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 280 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 352 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:52:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235144 states. [2022-07-22 12:52:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235144 to 226187. [2022-07-22 12:52:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226187 states, 226186 states have (on average 1.047748313335043) internal successors, (236986), 226186 states have internal predecessors, (236986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)