./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/product-lines/email_spec11_product03.cil.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 ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:23:03,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:23:03,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:23:03,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:23:03,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:23:03,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:23:03,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:23:03,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:23:03,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:23:03,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:23:03,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:23:03,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:23:03,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:23:03,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:23:03,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:23:03,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:23:03,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:23:03,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:23:03,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:23:03,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:23:03,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:23:03,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:23:03,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:23:03,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:23:03,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:23:03,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:23:03,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:23:03,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:23:03,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:23:03,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:23:03,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:23:03,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:23:03,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:23:03,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:23:03,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:23:03,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:23:03,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:23:03,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:23:03,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:23:03,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:23:03,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:23:03,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:23:03,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:23:03,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:23:03,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:23:03,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:23:03,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:23:03,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:23:03,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:23:03,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:23:03,980 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:23:03,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:23:03,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:23:03,981 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:23:03,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:23:03,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:23:03,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:23:03,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:23:03,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:23:03,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:23:03,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:23:03,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:23:03,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:23:03,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:23:03,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:23:03,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:23:03,985 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:23:03,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:23:03,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:23:03,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:23:03,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 [2021-12-22 11:23:04,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:23:04,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:23:04,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:23:04,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:23:04,239 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:23:04,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2021-12-22 11:23:04,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45459f6a9/9d390b419163485d8a36c1e6666d10fb/FLAGa02e76a83 [2021-12-22 11:23:04,712 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:23:04,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2021-12-22 11:23:04,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45459f6a9/9d390b419163485d8a36c1e6666d10fb/FLAGa02e76a83 [2021-12-22 11:23:05,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45459f6a9/9d390b419163485d8a36c1e6666d10fb [2021-12-22 11:23:05,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:23:05,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:23:05,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:23:05,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:23:05,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:23:05,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2390ee34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05, skipping insertion in model container [2021-12-22 11:23:05,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:23:05,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:23:05,366 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/product-lines/email_spec11_product03.cil.c[19915,19928] [2021-12-22 11:23:05,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:23:05,445 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:23:05,489 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/product-lines/email_spec11_product03.cil.c[19915,19928] [2021-12-22 11:23:05,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:23:05,558 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:23:05,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05 WrapperNode [2021-12-22 11:23:05,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:23:05,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:23:05,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:23:05,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:23:05,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,628 INFO L137 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 35, calls inlined = 27, statements flattened = 523 [2021-12-22 11:23:05,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:23:05,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:23:05,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:23:05,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:23:05,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:23:05,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:23:05,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:23:05,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:23:05,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (1/1) ... [2021-12-22 11:23:05,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:23:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:05,706 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) [2021-12-22 11:23:05,708 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 [2021-12-22 11:23:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-22 11:23:05,732 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-22 11:23:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-22 11:23:05,732 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-22 11:23:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-12-22 11:23:05,732 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-12-22 11:23:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-22 11:23:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-12-22 11:23:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-12-22 11:23:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-22 11:23:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-22 11:23:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:23:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-22 11:23:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-22 11:23:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-22 11:23:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-22 11:23:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-22 11:23:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-22 11:23:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:23:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:23:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:23:05,889 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:23:05,890 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:23:06,237 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:23:06,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:23:06,243 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:23:06,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:23:06 BoogieIcfgContainer [2021-12-22 11:23:06,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:23:06,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:23:06,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:23:06,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:23:06,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:23:05" (1/3) ... [2021-12-22 11:23:06,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4501af08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:23:06, skipping insertion in model container [2021-12-22 11:23:06,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:23:05" (2/3) ... [2021-12-22 11:23:06,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4501af08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:23:06, skipping insertion in model container [2021-12-22 11:23:06,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:23:06" (3/3) ... [2021-12-22 11:23:06,252 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product03.cil.c [2021-12-22 11:23:06,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:23:06,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:23:06,288 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:23:06,293 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:23:06,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:23:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 104 states have (on average 1.4807692307692308) internal successors, (154), 106 states have internal predecessors, (154), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-22 11:23:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:23:06,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:06,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-22 11:23:06,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1671433298, now seen corresponding path program 1 times [2021-12-22 11:23:06,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:06,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598545900] [2021-12-22 11:23:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:06,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 11:23:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:23:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 11:23:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 11:23:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 11:23:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 11:23:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 11:23:06,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:06,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598545900] [2021-12-22 11:23:06,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598545900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:23:06,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265197815] [2021-12-22 11:23:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:06,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:06,706 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) [2021-12-22 11:23:06,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:23:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-22 11:23:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:23:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 11:23:07,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:23:07,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265197815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:07,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:23:07,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2021-12-22 11:23:07,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658164114] [2021-12-22 11:23:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:07,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:23:07,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:23:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:07,100 INFO L87 Difference]: Start difference. First operand has 127 states, 104 states have (on average 1.4807692307692308) internal successors, (154), 106 states have internal predecessors, (154), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:07,121 INFO L93 Difference]: Finished difference Result 204 states and 279 transitions. [2021-12-22 11:23:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:23:07,124 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2021-12-22 11:23:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:07,134 INFO L225 Difference]: With dead ends: 204 [2021-12-22 11:23:07,135 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 11:23:07,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:07,141 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:07,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:23:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 11:23:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-22 11:23:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 99 states have internal predecessors, (143), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 11:23:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 168 transitions. [2021-12-22 11:23:07,200 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 168 transitions. Word has length 69 [2021-12-22 11:23:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:07,201 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 168 transitions. [2021-12-22 11:23:07,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 168 transitions. [2021-12-22 11:23:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:23:07,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:07,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-22 11:23:07,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:23:07,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 11:23:07,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1025509166, now seen corresponding path program 1 times [2021-12-22 11:23:07,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:07,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188195140] [2021-12-22 11:23:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:07,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 11:23:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 11:23:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 11:23:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 11:23:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 11:23:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 11:23:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 11:23:07,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188195140] [2021-12-22 11:23:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188195140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:23:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957298356] [2021-12-22 11:23:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:07,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:07,599 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) [2021-12-22 11:23:07,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:23:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 11:23:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:23:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 11:23:07,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:23:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957298356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:07,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:23:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-22 11:23:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406212914] [2021-12-22 11:23:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:07,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:23:07,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:23:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:23:07,931 INFO L87 Difference]: Start difference. First operand 120 states and 168 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:07,946 INFO L93 Difference]: Finished difference Result 194 states and 260 transitions. [2021-12-22 11:23:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:23:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-12-22 11:23:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:07,948 INFO L225 Difference]: With dead ends: 194 [2021-12-22 11:23:07,948 INFO L226 Difference]: Without dead ends: 123 [2021-12-22 11:23:07,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:23:07,959 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 1 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:07,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 330 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:23:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-22 11:23:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-12-22 11:23:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 100 states have (on average 1.45) internal successors, (145), 101 states have internal predecessors, (145), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 11:23:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2021-12-22 11:23:07,968 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 70 [2021-12-22 11:23:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:07,968 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2021-12-22 11:23:07,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2021-12-22 11:23:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-22 11:23:07,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:07,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-12-22 11:23:07,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:23:08,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-22 11:23:08,184 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1527449369, now seen corresponding path program 1 times [2021-12-22 11:23:08,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:08,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992128788] [2021-12-22 11:23:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:08,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 11:23:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 11:23:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 11:23:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 11:23:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 11:23:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:23:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:23:08,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992128788] [2021-12-22 11:23:08,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992128788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:23:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193223256] [2021-12-22 11:23:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:08,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:08,291 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) [2021-12-22 11:23:08,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:23:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 11:23:08,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:23:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:23:08,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:23:08,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193223256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:08,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:23:08,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-22 11:23:08,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027479304] [2021-12-22 11:23:08,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:08,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:23:08,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:08,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:23:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:23:08,597 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:08,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:08,649 INFO L93 Difference]: Finished difference Result 237 states and 333 transitions. [2021-12-22 11:23:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:23:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-12-22 11:23:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:08,651 INFO L225 Difference]: With dead ends: 237 [2021-12-22 11:23:08,651 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 11:23:08,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-22 11:23:08,653 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 73 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:08,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 560 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:23:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 11:23:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-22 11:23:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 103 states have internal predecessors, (146), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-12-22 11:23:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 173 transitions. [2021-12-22 11:23:08,671 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 173 transitions. Word has length 75 [2021-12-22 11:23:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:08,671 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 173 transitions. [2021-12-22 11:23:08,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 173 transitions. [2021-12-22 11:23:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-22 11:23:08,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:08,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:08,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:23:08,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:08,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1719790030, now seen corresponding path program 1 times [2021-12-22 11:23:08,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:08,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151491994] [2021-12-22 11:23:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:08,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:23:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-22 11:23:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 11:23:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 11:23:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 11:23:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:23:08,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:08,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151491994] [2021-12-22 11:23:08,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151491994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:08,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:08,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:23:08,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872891024] [2021-12-22 11:23:08,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:08,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:23:08,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:23:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:08,984 INFO L87 Difference]: Start difference. First operand 124 states and 173 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:09,483 INFO L93 Difference]: Finished difference Result 291 states and 410 transitions. [2021-12-22 11:23:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:23:09,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2021-12-22 11:23:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:09,485 INFO L225 Difference]: With dead ends: 291 [2021-12-22 11:23:09,485 INFO L226 Difference]: Without dead ends: 186 [2021-12-22 11:23:09,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:23:09,487 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 279 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:09,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 620 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:23:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-22 11:23:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 124. [2021-12-22 11:23:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 103 states have internal predecessors, (146), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-22 11:23:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2021-12-22 11:23:09,499 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 76 [2021-12-22 11:23:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:09,500 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2021-12-22 11:23:09,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2021-12-22 11:23:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 11:23:09,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:09,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:09,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:23:09,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash -88603257, now seen corresponding path program 2 times [2021-12-22 11:23:09,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:09,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152427118] [2021-12-22 11:23:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:09,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:23:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:23:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 11:23:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:23:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 11:23:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:23:09,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:09,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152427118] [2021-12-22 11:23:09,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152427118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:09,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:09,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:23:09,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466049053] [2021-12-22 11:23:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:09,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:23:09,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:09,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:23:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:09,594 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:09,959 INFO L93 Difference]: Finished difference Result 293 states and 413 transitions. [2021-12-22 11:23:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:23:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 77 [2021-12-22 11:23:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:09,961 INFO L225 Difference]: With dead ends: 293 [2021-12-22 11:23:09,961 INFO L226 Difference]: Without dead ends: 188 [2021-12-22 11:23:09,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:23:09,962 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 273 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:09,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 632 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:23:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-22 11:23:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 126. [2021-12-22 11:23:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 105 states have internal predecessors, (147), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 175 transitions. [2021-12-22 11:23:09,976 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 175 transitions. Word has length 77 [2021-12-22 11:23:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:09,977 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 175 transitions. [2021-12-22 11:23:09,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 175 transitions. [2021-12-22 11:23:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:23:09,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:09,978 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:09,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:23:09,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1889424617, now seen corresponding path program 1 times [2021-12-22 11:23:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762695289] [2021-12-22 11:23:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:09,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 11:23:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 11:23:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 11:23:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 11:23:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 11:23:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:10,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762695289] [2021-12-22 11:23:10,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762695289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:23:10,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217528448] [2021-12-22 11:23:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:10,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:10,050 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) [2021-12-22 11:23:10,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:23:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 11:23:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:23:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:10,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:23:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:10,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217528448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:23:10,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:23:10,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-22 11:23:10,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313210565] [2021-12-22 11:23:10,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:23:10,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 11:23:10,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 11:23:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:10,459 INFO L87 Difference]: Start difference. First operand 126 states and 175 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 11:23:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:10,827 INFO L93 Difference]: Finished difference Result 373 states and 556 transitions. [2021-12-22 11:23:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 11:23:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 78 [2021-12-22 11:23:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:10,830 INFO L225 Difference]: With dead ends: 373 [2021-12-22 11:23:10,830 INFO L226 Difference]: Without dead ends: 302 [2021-12-22 11:23:10,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:23:10,831 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 559 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:10,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 799 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:23:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-22 11:23:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 216. [2021-12-22 11:23:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 192 states have (on average 1.625) internal successors, (312), 195 states have internal predecessors, (312), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 340 transitions. [2021-12-22 11:23:10,846 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 340 transitions. Word has length 78 [2021-12-22 11:23:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:10,846 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 340 transitions. [2021-12-22 11:23:10,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 7 states have internal predecessors, (78), 2 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 11:23:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 340 transitions. [2021-12-22 11:23:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-22 11:23:10,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:10,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:10,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 11:23:11,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:11,063 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -396408711, now seen corresponding path program 1 times [2021-12-22 11:23:11,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:11,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982396549] [2021-12-22 11:23:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:11,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 11:23:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 11:23:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 11:23:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:23:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:11,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982396549] [2021-12-22 11:23:11,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982396549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:11,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:11,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:11,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916221073] [2021-12-22 11:23:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:11,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:11,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:11,149 INFO L87 Difference]: Start difference. First operand 216 states and 340 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:11,409 INFO L93 Difference]: Finished difference Result 563 states and 907 transitions. [2021-12-22 11:23:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2021-12-22 11:23:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:11,413 INFO L225 Difference]: With dead ends: 563 [2021-12-22 11:23:11,413 INFO L226 Difference]: Without dead ends: 375 [2021-12-22 11:23:11,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:11,414 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 269 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:11,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 532 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-22 11:23:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 305. [2021-12-22 11:23:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 281 states have (on average 1.6725978647686832) internal successors, (470), 284 states have internal predecessors, (470), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 498 transitions. [2021-12-22 11:23:11,441 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 498 transitions. Word has length 85 [2021-12-22 11:23:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 498 transitions. [2021-12-22 11:23:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 498 transitions. [2021-12-22 11:23:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-22 11:23:11,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:11,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:11,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:23:11,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1723354495, now seen corresponding path program 1 times [2021-12-22 11:23:11,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:11,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594722333] [2021-12-22 11:23:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:11,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 11:23:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 11:23:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 11:23:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:23:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 11:23:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:11,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594722333] [2021-12-22 11:23:11,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594722333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501062113] [2021-12-22 11:23:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:11,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:11,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:11,513 INFO L87 Difference]: Start difference. First operand 305 states and 498 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:11,783 INFO L93 Difference]: Finished difference Result 756 states and 1257 transitions. [2021-12-22 11:23:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:11,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2021-12-22 11:23:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:11,786 INFO L225 Difference]: With dead ends: 756 [2021-12-22 11:23:11,786 INFO L226 Difference]: Without dead ends: 497 [2021-12-22 11:23:11,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:11,787 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 267 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:11,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 524 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-12-22 11:23:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 427. [2021-12-22 11:23:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 403 states have (on average 1.7047146401985112) internal successors, (687), 406 states have internal predecessors, (687), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 715 transitions. [2021-12-22 11:23:11,820 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 715 transitions. Word has length 86 [2021-12-22 11:23:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 715 transitions. [2021-12-22 11:23:11,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 715 transitions. [2021-12-22 11:23:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 11:23:11,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:11,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:11,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:23:11,822 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash 221443351, now seen corresponding path program 1 times [2021-12-22 11:23:11,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:11,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521880123] [2021-12-22 11:23:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:11,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 11:23:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 11:23:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 11:23:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 11:23:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-22 11:23:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:11,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:11,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521880123] [2021-12-22 11:23:11,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521880123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:11,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:11,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:11,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291995297] [2021-12-22 11:23:11,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:11,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:11,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:11,892 INFO L87 Difference]: Start difference. First operand 427 states and 715 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:12,166 INFO L93 Difference]: Finished difference Result 1078 states and 1828 transitions. [2021-12-22 11:23:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:12,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-12-22 11:23:12,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:12,170 INFO L225 Difference]: With dead ends: 1078 [2021-12-22 11:23:12,170 INFO L226 Difference]: Without dead ends: 716 [2021-12-22 11:23:12,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:12,172 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 266 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:12,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 528 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-12-22 11:23:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 646. [2021-12-22 11:23:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 622 states have (on average 1.712218649517685) internal successors, (1065), 625 states have internal predecessors, (1065), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1093 transitions. [2021-12-22 11:23:12,194 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1093 transitions. Word has length 87 [2021-12-22 11:23:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:12,195 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1093 transitions. [2021-12-22 11:23:12,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1093 transitions. [2021-12-22 11:23:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 11:23:12,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:12,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:12,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:23:12,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1679828301, now seen corresponding path program 1 times [2021-12-22 11:23:12,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:12,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662918814] [2021-12-22 11:23:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:12,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 11:23:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 11:23:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 11:23:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 11:23:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 11:23:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:12,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662918814] [2021-12-22 11:23:12,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662918814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:12,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:12,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:12,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564852177] [2021-12-22 11:23:12,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:12,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:12,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:12,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:12,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:12,273 INFO L87 Difference]: Start difference. First operand 646 states and 1093 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:12,576 INFO L93 Difference]: Finished difference Result 1600 states and 2738 transitions. [2021-12-22 11:23:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2021-12-22 11:23:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:12,580 INFO L225 Difference]: With dead ends: 1600 [2021-12-22 11:23:12,580 INFO L226 Difference]: Without dead ends: 1067 [2021-12-22 11:23:12,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:12,582 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 264 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:12,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 524 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-12-22 11:23:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 997. [2021-12-22 11:23:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 973 states have (on average 1.7081192189105858) internal successors, (1662), 976 states have internal predecessors, (1662), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1690 transitions. [2021-12-22 11:23:12,612 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1690 transitions. Word has length 88 [2021-12-22 11:23:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:12,612 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1690 transitions. [2021-12-22 11:23:12,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1690 transitions. [2021-12-22 11:23:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 11:23:12,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:12,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:12,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:23:12,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:12,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -889624779, now seen corresponding path program 1 times [2021-12-22 11:23:12,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:12,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693555458] [2021-12-22 11:23:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:12,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 11:23:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 11:23:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 11:23:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 11:23:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 11:23:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:12,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693555458] [2021-12-22 11:23:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693555458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:12,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:12,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:12,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687071250] [2021-12-22 11:23:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:12,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:12,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:12,672 INFO L87 Difference]: Start difference. First operand 997 states and 1690 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:12,981 INFO L93 Difference]: Finished difference Result 2450 states and 4203 transitions. [2021-12-22 11:23:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:12,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2021-12-22 11:23:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:12,987 INFO L225 Difference]: With dead ends: 2450 [2021-12-22 11:23:12,987 INFO L226 Difference]: Without dead ends: 1646 [2021-12-22 11:23:12,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:12,990 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 262 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:12,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 524 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-12-22 11:23:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1576. [2021-12-22 11:23:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1552 states have (on average 1.6990979381443299) internal successors, (2637), 1555 states have internal predecessors, (2637), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2665 transitions. [2021-12-22 11:23:13,081 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2665 transitions. Word has length 89 [2021-12-22 11:23:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:13,081 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2665 transitions. [2021-12-22 11:23:13,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2665 transitions. [2021-12-22 11:23:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:23:13,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:13,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:13,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:23:13,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1310846161, now seen corresponding path program 1 times [2021-12-22 11:23:13,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:13,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585150587] [2021-12-22 11:23:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:13,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 11:23:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:23:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 11:23:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 11:23:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 11:23:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:13,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585150587] [2021-12-22 11:23:13,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585150587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:13,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:13,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:13,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598579871] [2021-12-22 11:23:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:13,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:13,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:13,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:13,143 INFO L87 Difference]: Start difference. First operand 1576 states and 2665 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:13,473 INFO L93 Difference]: Finished difference Result 3902 states and 6682 transitions. [2021-12-22 11:23:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2021-12-22 11:23:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:13,482 INFO L225 Difference]: With dead ends: 3902 [2021-12-22 11:23:13,482 INFO L226 Difference]: Without dead ends: 2639 [2021-12-22 11:23:13,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:13,484 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 260 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:13,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 526 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-12-22 11:23:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2569. [2021-12-22 11:23:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2545 states have (on average 1.6884086444007858) internal successors, (4297), 2548 states have internal predecessors, (4297), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 4325 transitions. [2021-12-22 11:23:13,595 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 4325 transitions. Word has length 90 [2021-12-22 11:23:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:13,595 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 4325 transitions. [2021-12-22 11:23:13,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:13,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 4325 transitions. [2021-12-22 11:23:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 11:23:13,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:13,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:13,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:23:13,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1626247507, now seen corresponding path program 1 times [2021-12-22 11:23:13,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:13,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055191008] [2021-12-22 11:23:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:13,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 11:23:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 11:23:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 11:23:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 11:23:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:13,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:13,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055191008] [2021-12-22 11:23:13,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055191008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:13,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:13,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:13,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088010761] [2021-12-22 11:23:13,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:13,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:13,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:13,679 INFO L87 Difference]: Start difference. First operand 2569 states and 4325 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:14,072 INFO L93 Difference]: Finished difference Result 6496 states and 11070 transitions. [2021-12-22 11:23:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:14,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-12-22 11:23:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:14,093 INFO L225 Difference]: With dead ends: 6496 [2021-12-22 11:23:14,093 INFO L226 Difference]: Without dead ends: 4408 [2021-12-22 11:23:14,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:14,100 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 259 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:14,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 518 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-12-22 11:23:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4338. [2021-12-22 11:23:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4314 states have (on average 1.67663421418637) internal successors, (7233), 4317 states have internal predecessors, (7233), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 7261 transitions. [2021-12-22 11:23:14,317 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 7261 transitions. Word has length 91 [2021-12-22 11:23:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:14,318 INFO L470 AbstractCegarLoop]: Abstraction has 4338 states and 7261 transitions. [2021-12-22 11:23:14,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 7261 transitions. [2021-12-22 11:23:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 11:23:14,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:14,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:14,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:23:14,327 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1889425681, now seen corresponding path program 1 times [2021-12-22 11:23:14,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:14,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421264428] [2021-12-22 11:23:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:14,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 11:23:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 11:23:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:23:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 11:23:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 11:23:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:14,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:14,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421264428] [2021-12-22 11:23:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421264428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:14,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:14,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:14,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869820255] [2021-12-22 11:23:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:14,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:14,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:14,393 INFO L87 Difference]: Start difference. First operand 4338 states and 7261 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:14,912 INFO L93 Difference]: Finished difference Result 11292 states and 19098 transitions. [2021-12-22 11:23:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-22 11:23:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:14,942 INFO L225 Difference]: With dead ends: 11292 [2021-12-22 11:23:14,943 INFO L226 Difference]: Without dead ends: 7659 [2021-12-22 11:23:14,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:14,951 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 256 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:14,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 526 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2021-12-22 11:23:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 7589. [2021-12-22 11:23:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7565 states have (on average 1.6629213483146068) internal successors, (12580), 7568 states have internal predecessors, (12580), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 12608 transitions. [2021-12-22 11:23:15,237 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 12608 transitions. Word has length 92 [2021-12-22 11:23:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:15,237 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 12608 transitions. [2021-12-22 11:23:15,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:15,238 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 12608 transitions. [2021-12-22 11:23:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 11:23:15,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:15,250 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 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] [2021-12-22 11:23:15,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:23:15,250 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash 54984254, now seen corresponding path program 2 times [2021-12-22 11:23:15,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:15,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599362134] [2021-12-22 11:23:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:15,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 11:23:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 11:23:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 11:23:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:23:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 11:23:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 11:23:15,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599362134] [2021-12-22 11:23:15,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599362134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:15,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:15,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:15,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434362520] [2021-12-22 11:23:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:15,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:15,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:15,318 INFO L87 Difference]: Start difference. First operand 7589 states and 12608 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:15,790 INFO L93 Difference]: Finished difference Result 14103 states and 23561 transitions. [2021-12-22 11:23:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-12-22 11:23:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:15,824 INFO L225 Difference]: With dead ends: 14103 [2021-12-22 11:23:15,824 INFO L226 Difference]: Without dead ends: 7659 [2021-12-22 11:23:15,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:15,837 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 269 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 759 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2021-12-22 11:23:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 7589. [2021-12-22 11:23:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7565 states have (on average 1.6448116325181759) internal successors, (12443), 7568 states have internal predecessors, (12443), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 12471 transitions. [2021-12-22 11:23:16,135 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 12471 transitions. Word has length 93 [2021-12-22 11:23:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 12471 transitions. [2021-12-22 11:23:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 12471 transitions. [2021-12-22 11:23:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 11:23:16,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:16,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:16,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:23:16,148 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2024778895, now seen corresponding path program 1 times [2021-12-22 11:23:16,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3959339] [2021-12-22 11:23:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:16,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 11:23:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 11:23:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 11:23:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 11:23:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 11:23:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:16,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:16,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3959339] [2021-12-22 11:23:16,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3959339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:16,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:16,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:16,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856926823] [2021-12-22 11:23:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:16,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:16,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:16,212 INFO L87 Difference]: Start difference. First operand 7589 states and 12471 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:16,832 INFO L93 Difference]: Finished difference Result 20366 states and 33702 transitions. [2021-12-22 11:23:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-12-22 11:23:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:16,862 INFO L225 Difference]: With dead ends: 20366 [2021-12-22 11:23:16,862 INFO L226 Difference]: Without dead ends: 13770 [2021-12-22 11:23:16,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:16,873 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 255 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:16,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 522 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13770 states. [2021-12-22 11:23:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13770 to 13700. [2021-12-22 11:23:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13700 states, 13676 states have (on average 1.626718338695525) internal successors, (22247), 13679 states have internal predecessors, (22247), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13700 states to 13700 states and 22275 transitions. [2021-12-22 11:23:17,291 INFO L78 Accepts]: Start accepts. Automaton has 13700 states and 22275 transitions. Word has length 93 [2021-12-22 11:23:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:17,291 INFO L470 AbstractCegarLoop]: Abstraction has 13700 states and 22275 transitions. [2021-12-22 11:23:17,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13700 states and 22275 transitions. [2021-12-22 11:23:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-22 11:23:17,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:17,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:17,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:23:17,312 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 522393331, now seen corresponding path program 1 times [2021-12-22 11:23:17,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:17,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938126262] [2021-12-22 11:23:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:17,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 11:23:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 11:23:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 11:23:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 11:23:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 11:23:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:17,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:17,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938126262] [2021-12-22 11:23:17,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938126262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:17,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:17,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:17,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471966885] [2021-12-22 11:23:17,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:17,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:17,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:17,380 INFO L87 Difference]: Start difference. First operand 13700 states and 22275 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:18,252 INFO L93 Difference]: Finished difference Result 37778 states and 61674 transitions. [2021-12-22 11:23:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2021-12-22 11:23:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:18,326 INFO L225 Difference]: With dead ends: 37778 [2021-12-22 11:23:18,326 INFO L226 Difference]: Without dead ends: 25431 [2021-12-22 11:23:18,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:18,348 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 251 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:18,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 532 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:23:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-12-22 11:23:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 25361. [2021-12-22 11:23:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25337 states have (on average 1.605083474760232) internal successors, (40668), 25340 states have internal predecessors, (40668), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 40696 transitions. [2021-12-22 11:23:19,283 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 40696 transitions. Word has length 94 [2021-12-22 11:23:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 25361 states and 40696 transitions. [2021-12-22 11:23:19,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 40696 transitions. [2021-12-22 11:23:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 11:23:19,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:19,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:19,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:23:19,308 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1876725135, now seen corresponding path program 1 times [2021-12-22 11:23:19,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:19,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506436815] [2021-12-22 11:23:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:19,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:23:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 11:23:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 11:23:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-22 11:23:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 11:23:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:19,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:19,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506436815] [2021-12-22 11:23:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506436815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:19,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:19,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:23:19,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069750184] [2021-12-22 11:23:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:23:19,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:23:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:23:19,369 INFO L87 Difference]: Start difference. First operand 25361 states and 40696 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:20,643 INFO L93 Difference]: Finished difference Result 47931 states and 76785 transitions. [2021-12-22 11:23:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:23:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-12-22 11:23:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:20,772 INFO L225 Difference]: With dead ends: 47931 [2021-12-22 11:23:20,773 INFO L226 Difference]: Without dead ends: 47860 [2021-12-22 11:23:20,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:23:20,790 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 250 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:20,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 522 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47860 states. [2021-12-22 11:23:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47860 to 47790. [2021-12-22 11:23:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47790 states, 47766 states have (on average 1.580119750450111) internal successors, (75476), 47769 states have internal predecessors, (75476), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-12-22 11:23:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47790 states to 47790 states and 75504 transitions. [2021-12-22 11:23:22,579 INFO L78 Accepts]: Start accepts. Automaton has 47790 states and 75504 transitions. Word has length 95 [2021-12-22 11:23:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:22,579 INFO L470 AbstractCegarLoop]: Abstraction has 47790 states and 75504 transitions. [2021-12-22 11:23:22,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47790 states and 75504 transitions. [2021-12-22 11:23:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 11:23:22,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:22,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:22,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 11:23:22,601 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash -206672683, now seen corresponding path program 1 times [2021-12-22 11:23:22,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939248420] [2021-12-22 11:23:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:22,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 11:23:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:23:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 11:23:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 11:23:22,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939248420] [2021-12-22 11:23:22,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939248420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:23:22,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011180761] [2021-12-22 11:23:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:22,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:22,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:23:22,762 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:23:22,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:23:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:22,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 11:23:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:23:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:23:23,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:23:23,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011180761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:23,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 11:23:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2021-12-22 11:23:23,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051860096] [2021-12-22 11:23:23,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:23,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 11:23:23,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 11:23:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-12-22 11:23:23,229 INFO L87 Difference]: Start difference. First operand 47790 states and 75504 transitions. Second operand has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:23:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:24,650 INFO L93 Difference]: Finished difference Result 48000 states and 75766 transitions. [2021-12-22 11:23:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 11:23:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 96 [2021-12-22 11:23:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:24,764 INFO L225 Difference]: With dead ends: 48000 [2021-12-22 11:23:24,764 INFO L226 Difference]: Without dead ends: 47935 [2021-12-22 11:23:24,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 11:23:24,787 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 378 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:24,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 1624 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:23:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47935 states. [2021-12-22 11:23:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47935 to 47884. [2021-12-22 11:23:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47884 states, 47840 states have (on average 1.5796822742474916) internal successors, (75572), 47844 states have internal predecessors, (75572), 23 states have call successors, (23), 15 states have call predecessors, (23), 20 states have return successors, (30), 24 states have call predecessors, (30), 21 states have call successors, (30) [2021-12-22 11:23:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47884 states to 47884 states and 75625 transitions. [2021-12-22 11:23:26,649 INFO L78 Accepts]: Start accepts. Automaton has 47884 states and 75625 transitions. Word has length 96 [2021-12-22 11:23:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:26,649 INFO L470 AbstractCegarLoop]: Abstraction has 47884 states and 75625 transitions. [2021-12-22 11:23:26,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:23:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47884 states and 75625 transitions. [2021-12-22 11:23:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:23:26,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:26,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:26,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:23:26,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:23:26,887 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1817903000, now seen corresponding path program 1 times [2021-12-22 11:23:26,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450900928] [2021-12-22 11:23:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:26,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 11:23:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:23:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 11:23:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:26,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450900928] [2021-12-22 11:23:26,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450900928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:26,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:26,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:23:26,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019711206] [2021-12-22 11:23:26,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:26,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:23:26,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:23:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:26,974 INFO L87 Difference]: Start difference. First operand 47884 states and 75625 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:30,288 INFO L93 Difference]: Finished difference Result 94505 states and 149401 transitions. [2021-12-22 11:23:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 11:23:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 97 [2021-12-22 11:23:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:30,542 INFO L225 Difference]: With dead ends: 94505 [2021-12-22 11:23:30,542 INFO L226 Difference]: Without dead ends: 94355 [2021-12-22 11:23:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-12-22 11:23:30,579 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 546 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:30,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 729 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 11:23:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94355 states. [2021-12-22 11:23:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94355 to 94053. [2021-12-22 11:23:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94053 states, 93968 states have (on average 1.5819534309552188) internal successors, (148653), 93977 states have internal predecessors, (148653), 43 states have call successors, (43), 28 states have call predecessors, (43), 41 states have return successors, (62), 47 states have call predecessors, (62), 39 states have call successors, (62) [2021-12-22 11:23:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94053 states to 94053 states and 148758 transitions. [2021-12-22 11:23:34,534 INFO L78 Accepts]: Start accepts. Automaton has 94053 states and 148758 transitions. Word has length 97 [2021-12-22 11:23:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:34,534 INFO L470 AbstractCegarLoop]: Abstraction has 94053 states and 148758 transitions. [2021-12-22 11:23:34,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-22 11:23:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94053 states and 148758 transitions. [2021-12-22 11:23:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:23:34,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:34,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:34,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 11:23:34,564 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash -834301338, now seen corresponding path program 1 times [2021-12-22 11:23:34,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:34,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787753484] [2021-12-22 11:23:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:34,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 11:23:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:23:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 11:23:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:34,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787753484] [2021-12-22 11:23:34,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787753484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:34,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:34,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 11:23:34,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424408436] [2021-12-22 11:23:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:34,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 11:23:34,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 11:23:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:23:34,673 INFO L87 Difference]: Start difference. First operand 94053 states and 148758 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:23:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:38,002 INFO L93 Difference]: Finished difference Result 94935 states and 149937 transitions. [2021-12-22 11:23:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 11:23:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 97 [2021-12-22 11:23:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:38,245 INFO L225 Difference]: With dead ends: 94935 [2021-12-22 11:23:38,245 INFO L226 Difference]: Without dead ends: 94419 [2021-12-22 11:23:38,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 11:23:38,277 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 425 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:38,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1231 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 11:23:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94419 states. [2021-12-22 11:23:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94419 to 94087. [2021-12-22 11:23:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94087 states, 93998 states have (on average 1.5818953594757335) internal successors, (148695), 94004 states have internal predecessors, (148695), 49 states have call successors, (49), 32 states have call predecessors, (49), 39 states have return successors, (60), 50 states have call predecessors, (60), 45 states have call successors, (60) [2021-12-22 11:23:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94087 states to 94087 states and 148804 transitions. [2021-12-22 11:23:41,753 INFO L78 Accepts]: Start accepts. Automaton has 94087 states and 148804 transitions. Word has length 97 [2021-12-22 11:23:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:41,753 INFO L470 AbstractCegarLoop]: Abstraction has 94087 states and 148804 transitions. [2021-12-22 11:23:41,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 9 states have internal predecessors, (71), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:23:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 94087 states and 148804 transitions. [2021-12-22 11:23:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:23:41,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:41,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:41,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 11:23:41,785 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1488412133, now seen corresponding path program 1 times [2021-12-22 11:23:41,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:41,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666134727] [2021-12-22 11:23:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:41,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 11:23:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 11:23:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 11:23:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:41,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666134727] [2021-12-22 11:23:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666134727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:41,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:41,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:23:41,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679150147] [2021-12-22 11:23:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:41,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:23:41,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:23:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:23:41,860 INFO L87 Difference]: Start difference. First operand 94087 states and 148804 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:23:44,715 INFO L93 Difference]: Finished difference Result 94369 states and 149168 transitions. [2021-12-22 11:23:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:23:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2021-12-22 11:23:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:23:44,917 INFO L225 Difference]: With dead ends: 94369 [2021-12-22 11:23:44,918 INFO L226 Difference]: Without dead ends: 94183 [2021-12-22 11:23:44,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-22 11:23:44,949 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 212 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:23:44,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 703 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:23:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94183 states. [2021-12-22 11:23:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94183 to 93992. [2021-12-22 11:23:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93992 states, 93925 states have (on average 1.582081447963801) internal successors, (148597), 93926 states have internal predecessors, (148597), 36 states have call successors, (36), 27 states have call predecessors, (36), 30 states have return successors, (41), 38 states have call predecessors, (41), 32 states have call successors, (41) [2021-12-22 11:23:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93992 states to 93992 states and 148674 transitions. [2021-12-22 11:23:48,378 INFO L78 Accepts]: Start accepts. Automaton has 93992 states and 148674 transitions. Word has length 97 [2021-12-22 11:23:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:23:48,378 INFO L470 AbstractCegarLoop]: Abstraction has 93992 states and 148674 transitions. [2021-12-22 11:23:48,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 11:23:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 93992 states and 148674 transitions. [2021-12-22 11:23:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 11:23:48,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:23:48,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-22 11:23:48,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 11:23:48,412 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:23:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:23:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1209002800, now seen corresponding path program 1 times [2021-12-22 11:23:48,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:23:48,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575697018] [2021-12-22 11:23:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:23:48,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:23:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-22 11:23:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:23:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 11:23:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:23:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 11:23:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 11:23:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:23:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 11:23:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:23:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:23:48,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:23:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575697018] [2021-12-22 11:23:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575697018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:23:48,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:23:48,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-22 11:23:48,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839204456] [2021-12-22 11:23:48,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:23:48,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 11:23:48,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:23:48,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 11:23:48,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:23:48,530 INFO L87 Difference]: Start difference. First operand 93992 states and 148674 transitions. Second operand has 15 states, 14 states have (on average 5.142857142857143) internal successors, (72), 10 states have internal predecessors, (72), 5 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8)