./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:27:12,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:27:12,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:27:12,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:27:12,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:27:12,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:27:12,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:27:12,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:27:12,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:27:12,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:27:12,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:27:12,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:27:12,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:27:12,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:27:12,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:27:12,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:27:12,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:27:12,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:27:12,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:27:12,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:27:12,958 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:27:12,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:27:12,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:27:12,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:27:12,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:27:12,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:27:12,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:27:12,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:27:12,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:27:12,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:27:12,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:27:12,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:27:12,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:27:12,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:27:12,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:27:12,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:27:12,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:27:12,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:27:12,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:27:12,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:27:12,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:27:12,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:27:12,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:27:12,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:27:12,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:27:12,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:27:12,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:27:12,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:27:12,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:27:12,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:27:12,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:27:12,995 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:27:12,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:27:12,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:27:12,996 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:27:12,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:27:12,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:27:12,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:27:12,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:27:12,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:27:12,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:27:12,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:27:13,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa [2022-07-20 06:27:13,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:27:13,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:27:13,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:27:13,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:27:13,229 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:27:13,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2022-07-20 06:27:13,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77363504/1de0a6610f2d42fd9605db33df7c5de8/FLAGaabcd28cd [2022-07-20 06:27:13,648 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:27:13,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2022-07-20 06:27:13,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77363504/1de0a6610f2d42fd9605db33df7c5de8/FLAGaabcd28cd [2022-07-20 06:27:13,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b77363504/1de0a6610f2d42fd9605db33df7c5de8 [2022-07-20 06:27:13,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:27:13,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:27:13,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:27:13,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:27:13,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:27:13,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:13,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af0fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13, skipping insertion in model container [2022-07-20 06:27:13,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:13,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:27:13,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:27:13,902 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/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2022-07-20 06:27:13,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:27:13,912 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:27:13,938 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/list-ext3-properties/dll_circular_traversal-1.i[24175,24188] [2022-07-20 06:27:13,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:27:13,954 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:27:13,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13 WrapperNode [2022-07-20 06:27:13,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:27:13,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:27:13,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:27:13,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:27:13,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:13,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,004 INFO L137 Inliner]: procedures = 122, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-07-20 06:27:14,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:27:14,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:27:14,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:27:14,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:27:14,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:27:14,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:27:14,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:27:14,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:27:14,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (1/1) ... [2022-07-20 06:27:14,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:27:14,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:14,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 06:27:14,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 06:27:14,092 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-20 06:27:14,092 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:27:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:27:14,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:27:14,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:27:14,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:27:14,238 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:27:14,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:27:14,287 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-20 06:27:14,464 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:27:14,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:27:14,469 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 06:27:14,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:27:14 BoogieIcfgContainer [2022-07-20 06:27:14,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:27:14,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:27:14,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:27:14,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:27:14,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:27:13" (1/3) ... [2022-07-20 06:27:14,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa57813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:27:14, skipping insertion in model container [2022-07-20 06:27:14,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:27:13" (2/3) ... [2022-07-20 06:27:14,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa57813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:27:14, skipping insertion in model container [2022-07-20 06:27:14,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:27:14" (3/3) ... [2022-07-20 06:27:14,483 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-1.i [2022-07-20 06:27:14,492 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:27:14,492 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-07-20 06:27:14,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:27:14,534 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c85732e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2202f44 [2022-07-20 06:27:14,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-07-20 06:27:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:27:14,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:14,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:27:14,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2022-07-20 06:27:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:14,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756868976] [2022-07-20 06:27:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756868976] [2022-07-20 06:27:14,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756868976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:14,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:14,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:27:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325810671] [2022-07-20 06:27:14,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:27:14,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:27:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:14,723 INFO L87 Difference]: Start difference. First operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:14,807 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-07-20 06:27:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:27:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 06:27:14,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:14,813 INFO L225 Difference]: With dead ends: 91 [2022-07-20 06:27:14,813 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 06:27:14,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:14,817 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:14,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 06:27:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2022-07-20 06:27:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.864864864864865) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-20 06:27:14,848 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 4 [2022-07-20 06:27:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:14,848 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-20 06:27:14,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-20 06:27:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:27:14,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:14,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:27:14,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:27:14,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2022-07-20 06:27:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:14,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370394823] [2022-07-20 06:27:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:14,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:14,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370394823] [2022-07-20 06:27:14,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370394823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:14,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:14,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:27:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448544148] [2022-07-20 06:27:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:27:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:27:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:14,913 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:14,959 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-07-20 06:27:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:27:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 06:27:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:14,962 INFO L225 Difference]: With dead ends: 61 [2022-07-20 06:27:14,962 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 06:27:14,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:14,966 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:14,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:27:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 06:27:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-20 06:27:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-07-20 06:27:14,977 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2022-07-20 06:27:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:14,978 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-07-20 06:27:14,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-07-20 06:27:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:27:14,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:14,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:14,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:27:14,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash -401980428, now seen corresponding path program 1 times [2022-07-20 06:27:14,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:14,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122611268] [2022-07-20 06:27:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:14,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122611268] [2022-07-20 06:27:15,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122611268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:15,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:15,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:27:15,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090016383] [2022-07-20 06:27:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:27:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:27:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,035 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,107 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-07-20 06:27:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:27:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 06:27:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,109 INFO L225 Difference]: With dead ends: 100 [2022-07-20 06:27:15,110 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 06:27:15,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,112 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:15,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 110 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 06:27:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 59. [2022-07-20 06:27:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-07-20 06:27:15,116 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 10 [2022-07-20 06:27:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,116 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-07-20 06:27:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-07-20 06:27:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:27:15,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:27:15,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -401980427, now seen corresponding path program 1 times [2022-07-20 06:27:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439710747] [2022-07-20 06:27:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439710747] [2022-07-20 06:27:15,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439710747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:15,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:15,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:27:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097194805] [2022-07-20 06:27:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:27:15,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:27:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,170 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,214 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2022-07-20 06:27:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:27:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 06:27:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,216 INFO L225 Difference]: With dead ends: 100 [2022-07-20 06:27:15,217 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 06:27:15,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,218 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:15,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:27:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 06:27:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-07-20 06:27:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-20 06:27:15,226 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2022-07-20 06:27:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,226 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-20 06:27:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-20 06:27:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 06:27:15,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:27:15,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -401981869, now seen corresponding path program 1 times [2022-07-20 06:27:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849251070] [2022-07-20 06:27:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849251070] [2022-07-20 06:27:15,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849251070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:15,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:15,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:27:15,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921865171] [2022-07-20 06:27:15,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:27:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:27:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,289 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,298 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-07-20 06:27:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:27:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 06:27:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,299 INFO L225 Difference]: With dead ends: 65 [2022-07-20 06:27:15,300 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 06:27:15,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:27:15,301 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 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 [2022-07-20 06:27:15,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:27:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 06:27:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-07-20 06:27:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.631578947368421) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-07-20 06:27:15,308 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 10 [2022-07-20 06:27:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-07-20 06:27:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-07-20 06:27:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:27:15,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 06:27:15,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 243865783, now seen corresponding path program 1 times [2022-07-20 06:27:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:15,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210035089] [2022-07-20 06:27:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210035089] [2022-07-20 06:27:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210035089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:15,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:15,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:27:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641609899] [2022-07-20 06:27:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:27:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:27:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:27:15,385 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,464 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-20 06:27:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:27:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 06:27:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,466 INFO L225 Difference]: With dead ends: 81 [2022-07-20 06:27:15,466 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 06:27:15,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:27:15,466 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:15,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 74 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 06:27:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-07-20 06:27:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-07-20 06:27:15,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 12 [2022-07-20 06:27:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,470 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-07-20 06:27:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-07-20 06:27:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 06:27:15,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 06:27:15,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 243865784, now seen corresponding path program 1 times [2022-07-20 06:27:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360082571] [2022-07-20 06:27:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360082571] [2022-07-20 06:27:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360082571] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:15,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:15,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:27:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395361119] [2022-07-20 06:27:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:27:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:27:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:27:15,584 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,662 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-20 06:27:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:27:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 06:27:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,663 INFO L225 Difference]: With dead ends: 81 [2022-07-20 06:27:15,663 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 06:27:15,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:27:15,666 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 140 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:15,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 58 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 06:27:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-07-20 06:27:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-07-20 06:27:15,680 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 12 [2022-07-20 06:27:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,680 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-07-20 06:27:15,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-07-20 06:27:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 06:27:15,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 06:27:15,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -27720857, now seen corresponding path program 1 times [2022-07-20 06:27:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:15,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703059590] [2022-07-20 06:27:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:15,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703059590] [2022-07-20 06:27:15,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703059590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:15,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645982666] [2022-07-20 06:27:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:15,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:15,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:15,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:15,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:27:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:15,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:27:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:15,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645982666] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:15,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:15,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 06:27:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349615039] [2022-07-20 06:27:15,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:27:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:27:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:27:15,911 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:15,925 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-20 06:27:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:27:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 06:27:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:15,927 INFO L225 Difference]: With dead ends: 80 [2022-07-20 06:27:15,927 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 06:27:15,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:27:15,928 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:15,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:27:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 06:27:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-20 06:27:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.5) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-07-20 06:27:15,935 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 16 [2022-07-20 06:27:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:15,935 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-07-20 06:27:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-07-20 06:27:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 06:27:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:15,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:15,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:16,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:16,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash -868554549, now seen corresponding path program 1 times [2022-07-20 06:27:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:16,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704295010] [2022-07-20 06:27:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:16,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704295010] [2022-07-20 06:27:16,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704295010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991131619] [2022-07-20 06:27:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:16,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:16,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:27:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:16,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 06:27:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:16,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:16,346 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:27:16,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:27:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:16,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991131619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:16,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:16,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-20 06:27:16,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22113511] [2022-07-20 06:27:16,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:27:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:27:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:27:16,417 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:16,471 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-07-20 06:27:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:27:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 06:27:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:16,472 INFO L225 Difference]: With dead ends: 92 [2022-07-20 06:27:16,472 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 06:27:16,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:27:16,473 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:16,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 111 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-07-20 06:27:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 06:27:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2022-07-20 06:27:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-07-20 06:27:16,475 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 18 [2022-07-20 06:27:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:16,475 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-07-20 06:27:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-07-20 06:27:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 06:27:16,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:16,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:16,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 06:27:16,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -868554548, now seen corresponding path program 1 times [2022-07-20 06:27:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653787570] [2022-07-20 06:27:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653787570] [2022-07-20 06:27:16,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653787570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935530839] [2022-07-20 06:27:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:16,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:16,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:16,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:27:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:27:16,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:16,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:16,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:16,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:27:16,879 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:27:16,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:27:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:16,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:17,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935530839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:17,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:17,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-07-20 06:27:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849355284] [2022-07-20 06:27:17,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:27:17,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:27:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:27:17,043 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:17,189 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-07-20 06:27:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:27:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-20 06:27:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:17,190 INFO L225 Difference]: With dead ends: 90 [2022-07-20 06:27:17,190 INFO L226 Difference]: Without dead ends: 90 [2022-07-20 06:27:17,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:27:17,191 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 167 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:17,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 81 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-07-20 06:27:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-20 06:27:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2022-07-20 06:27:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-07-20 06:27:17,193 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 18 [2022-07-20 06:27:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:17,193 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-07-20 06:27:17,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-07-20 06:27:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:27:17,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:17,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:17,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:17,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash 140768543, now seen corresponding path program 1 times [2022-07-20 06:27:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:17,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783007740] [2022-07-20 06:27:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:17,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 06:27:17,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783007740] [2022-07-20 06:27:17,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783007740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:17,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:17,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:27:17,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856985391] [2022-07-20 06:27:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:17,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:27:17,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:27:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:27:17,491 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:17,581 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-07-20 06:27:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:27:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 06:27:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:17,582 INFO L225 Difference]: With dead ends: 88 [2022-07-20 06:27:17,582 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 06:27:17,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:27:17,582 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:17,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 71 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 06:27:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-07-20 06:27:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-07-20 06:27:17,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2022-07-20 06:27:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:17,584 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-07-20 06:27:17,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-07-20 06:27:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 06:27:17,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:17,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:17,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 06:27:17,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 140768544, now seen corresponding path program 1 times [2022-07-20 06:27:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:17,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226275433] [2022-07-20 06:27:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 06:27:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226275433] [2022-07-20 06:27:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226275433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:17,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:17,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:27:17,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484081435] [2022-07-20 06:27:17,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:17,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:27:17,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:27:17,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:27:17,656 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:17,752 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-07-20 06:27:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:27:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 06:27:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:17,753 INFO L225 Difference]: With dead ends: 76 [2022-07-20 06:27:17,753 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 06:27:17,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:27:17,753 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:17,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 50 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 06:27:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-20 06:27:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-07-20 06:27:17,755 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2022-07-20 06:27:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-07-20 06:27:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-07-20 06:27:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 06:27:17,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:17,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 06:27:17,756 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1747626123, now seen corresponding path program 1 times [2022-07-20 06:27:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324494293] [2022-07-20 06:27:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 06:27:17,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:17,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324494293] [2022-07-20 06:27:17,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324494293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:17,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113651579] [2022-07-20 06:27:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:17,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:17,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:27:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 06:27:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:18,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:18,304 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:27:18,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:27:18,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:27:18,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:27:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:18,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:18,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:18,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:18,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:27:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:27:18,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:19,141 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-20 06:27:20,199 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-20 06:27:20,208 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-20 06:27:20,216 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:20,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-20 06:27:20,230 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:20,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 214 [2022-07-20 06:27:20,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 234 [2022-07-20 06:27:20,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-20 06:27:20,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-20 06:27:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2022-07-20 06:27:20,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113651579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:20,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:20,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-07-20 06:27:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228570719] [2022-07-20 06:27:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:20,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 06:27:20,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 06:27:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=675, Unknown=3, NotChecked=162, Total=930 [2022-07-20 06:27:20,655 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:20,798 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) is different from false [2022-07-20 06:27:21,127 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-20 06:27:21,464 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-20 06:27:21,492 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-20 06:27:22,105 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-20 06:27:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:22,239 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-07-20 06:27:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 06:27:22,251 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 06:27:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:22,252 INFO L225 Difference]: With dead ends: 72 [2022-07-20 06:27:22,252 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 06:27:22,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=185, Invalid=1099, Unknown=8, NotChecked=600, Total=1892 [2022-07-20 06:27:22,256 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 512 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 335 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-07-20 06:27:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 06:27:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-20 06:27:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-07-20 06:27:22,259 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2022-07-20 06:27:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:22,259 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-07-20 06:27:22,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-07-20 06:27:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:27:22,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:22,263 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:22,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:22,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:22,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -56889687, now seen corresponding path program 1 times [2022-07-20 06:27:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20136690] [2022-07-20 06:27:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 06:27:22,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20136690] [2022-07-20 06:27:22,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20136690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:22,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:22,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:27:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30339412] [2022-07-20 06:27:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:27:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:27:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:27:22,563 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:22,676 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-20 06:27:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:27:22,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 06:27:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:22,678 INFO L225 Difference]: With dead ends: 92 [2022-07-20 06:27:22,678 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 06:27:22,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:27:22,678 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 156 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:22,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 88 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 06:27:22,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2022-07-20 06:27:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.25) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-07-20 06:27:22,680 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 43 [2022-07-20 06:27:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:22,681 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-07-20 06:27:22,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-07-20 06:27:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:27:22,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:22,681 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:22,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 06:27:22,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash -56889686, now seen corresponding path program 1 times [2022-07-20 06:27:22,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:22,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320954334] [2022-07-20 06:27:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:22,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 06:27:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:22,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320954334] [2022-07-20 06:27:22,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320954334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:22,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:22,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:27:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179999793] [2022-07-20 06:27:22,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:27:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:27:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:27:22,770 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:22,885 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-20 06:27:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:27:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 06:27:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:22,886 INFO L225 Difference]: With dead ends: 74 [2022-07-20 06:27:22,886 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 06:27:22,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:27:22,886 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:22,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 49 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 06:27:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-07-20 06:27:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-07-20 06:27:22,888 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 43 [2022-07-20 06:27:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:22,888 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-07-20 06:27:22,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-07-20 06:27:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:27:22,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:22,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:22,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 06:27:22,889 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:22,890 INFO L85 PathProgramCache]: Analyzing trace with hash -56889649, now seen corresponding path program 1 times [2022-07-20 06:27:22,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:22,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001512736] [2022-07-20 06:27:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:22,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:27:23,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001512736] [2022-07-20 06:27:23,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001512736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012151828] [2022-07-20 06:27:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:23,198 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) [2022-07-20 06:27:23,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:27:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:23,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 06:27:23,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:23,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:23,426 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:27:23,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 06:27:23,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:23,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:23,525 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:27:23,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-20 06:27:23,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 06:27:23,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:23,624 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:27:23,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-20 06:27:23,651 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:27:23,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 06:27:23,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-20 06:27:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:23,721 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:23,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2022-07-20 06:27:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 06:27:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,968 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:23,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2022-07-20 06:27:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:23,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 85 [2022-07-20 06:27:24,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:24,020 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:24,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2022-07-20 06:27:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:24,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:24,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2022-07-20 06:27:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:27:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:24,671 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:24,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2022-07-20 06:27:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:24,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-07-20 06:27:24,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-20 06:27:24,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:24,686 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:24,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2022-07-20 06:27:24,697 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:24,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 178 [2022-07-20 06:27:24,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 182 [2022-07-20 06:27:24,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2022-07-20 06:27:24,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-07-20 06:27:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:27:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012151828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:25,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-07-20 06:27:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955142887] [2022-07-20 06:27:25,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 06:27:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 06:27:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1643, Unknown=7, NotChecked=0, Total=1806 [2022-07-20 06:27:25,468 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:27,255 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-07-20 06:27:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 06:27:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 06:27:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:27,256 INFO L225 Difference]: With dead ends: 116 [2022-07-20 06:27:27,256 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 06:27:27,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=681, Invalid=3601, Unknown=8, NotChecked=0, Total=4290 [2022-07-20 06:27:27,258 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 628 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:27,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 391 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 678 Invalid, 0 Unknown, 388 Unchecked, 0.3s Time] [2022-07-20 06:27:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 06:27:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 73. [2022-07-20 06:27:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2022-07-20 06:27:27,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2022-07-20 06:27:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:27,260 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2022-07-20 06:27:27,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2022-07-20 06:27:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:27:27,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:27,260 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:27,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 06:27:27,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash -56889648, now seen corresponding path program 1 times [2022-07-20 06:27:27,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:27,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247143687] [2022-07-20 06:27:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:27,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:27:27,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247143687] [2022-07-20 06:27:27,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247143687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35358314] [2022-07-20 06:27:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:27,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:27,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:27,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:27,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:27:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:28,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 06:27:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:28,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:27:28,095 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:27:28,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:27:28,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:28,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:28,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:28,186 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:27:28,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-07-20 06:27:28,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-20 06:27:28,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,278 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:27:28,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-07-20 06:27:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,288 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:27:28,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-07-20 06:27:28,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,372 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:28,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 83 [2022-07-20 06:27:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,379 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-20 06:27:28,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 98 [2022-07-20 06:27:28,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,612 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:28,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2022-07-20 06:27:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:28,618 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:28,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 83 [2022-07-20 06:27:28,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,659 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:28,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 65 [2022-07-20 06:27:28,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:28,670 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:27:28,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 66 [2022-07-20 06:27:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:27:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:29,185 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:29,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2022-07-20 06:27:29,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:29,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:29,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 109 [2022-07-20 06:27:29,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:29,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:29,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 83 [2022-07-20 06:27:29,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-07-20 06:27:29,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 69 [2022-07-20 06:27:29,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 89 [2022-07-20 06:27:29,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-20 06:27:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:27:29,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35358314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:27:29,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:27:29,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2022-07-20 06:27:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394308282] [2022-07-20 06:27:29,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:27:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 06:27:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 06:27:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1658, Unknown=6, NotChecked=0, Total=1806 [2022-07-20 06:27:29,558 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:30,759 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-20 06:27:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 06:27:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 06:27:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:30,760 INFO L225 Difference]: With dead ends: 81 [2022-07-20 06:27:30,760 INFO L226 Difference]: Without dead ends: 81 [2022-07-20 06:27:30,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=353, Invalid=2947, Unknown=6, NotChecked=0, Total=3306 [2022-07-20 06:27:30,761 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 386 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 607 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-07-20 06:27:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-20 06:27:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2022-07-20 06:27:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-07-20 06:27:30,763 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 43 [2022-07-20 06:27:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-07-20 06:27:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-07-20 06:27:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:27:30,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:30,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:30,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:27:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 06:27:30,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479191, now seen corresponding path program 1 times [2022-07-20 06:27:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614300834] [2022-07-20 06:27:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 06:27:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:31,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614300834] [2022-07-20 06:27:31,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614300834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:31,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:27:31,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-20 06:27:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728795597] [2022-07-20 06:27:31,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 06:27:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 06:27:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:27:31,187 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:31,547 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-07-20 06:27:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 06:27:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-20 06:27:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:31,547 INFO L225 Difference]: With dead ends: 114 [2022-07-20 06:27:31,547 INFO L226 Difference]: Without dead ends: 114 [2022-07-20 06:27:31,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-07-20 06:27:31,548 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 306 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:31,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 118 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-20 06:27:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2022-07-20 06:27:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-07-20 06:27:31,550 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 46 [2022-07-20 06:27:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:31,550 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-07-20 06:27:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-07-20 06:27:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:27:31,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:31,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 06:27:31,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479192, now seen corresponding path program 1 times [2022-07-20 06:27:31,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:31,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578708859] [2022-07-20 06:27:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:27:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:31,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578708859] [2022-07-20 06:27:31,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578708859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:31,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521954717] [2022-07-20 06:27:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:31,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:31,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:27:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 06:27:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:32,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:32,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:32,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2022-07-20 06:27:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:32,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 06:27:32,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-20 06:27:32,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-20 06:27:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 06:27:32,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:27:32,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521954717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:27:32,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:27:32,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 27 [2022-07-20 06:27:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342919184] [2022-07-20 06:27:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:27:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:27:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:27:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:27:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-20 06:27:32,197 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:27:32,451 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-07-20 06:27:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:27:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-20 06:27:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:27:32,452 INFO L225 Difference]: With dead ends: 94 [2022-07-20 06:27:32,452 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 06:27:32,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 06:27:32,453 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 159 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:27:32,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 141 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:27:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 06:27:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2022-07-20 06:27:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2022-07-20 06:27:32,455 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 46 [2022-07-20 06:27:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:27:32,455 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2022-07-20 06:27:32,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 06:27:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2022-07-20 06:27:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:27:32,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:27:32,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:27:32,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 06:27:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:32,664 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-20 06:27:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:27:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1712591067, now seen corresponding path program 1 times [2022-07-20 06:27:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:27:32,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158119636] [2022-07-20 06:27:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:27:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:33,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:27:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158119636] [2022-07-20 06:27:33,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158119636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:27:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924687724] [2022-07-20 06:27:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:27:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:27:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:27:33,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:27:33,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 06:27:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:27:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 06:27:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:27:33,522 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:27:33,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 06:27:33,625 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-20 06:27:33,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 06:27:33,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:27:33,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:27:33,846 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 06:27:33,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:27:33,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:27:33,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:33,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:27:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:33,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:33,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:27:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:33,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:34,010 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 06:27:34,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-07-20 06:27:34,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-07-20 06:27:34,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-20 06:27:34,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-07-20 06:27:34,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:27:34,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 06:27:34,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:34,192 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:34,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2022-07-20 06:27:34,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:27:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-20 06:27:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,374 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:27:34,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 50 [2022-07-20 06:27:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:27:34,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-20 06:27:34,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 06:27:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:34,444 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-20 06:27:34,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 39 [2022-07-20 06:27:34,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:34,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-07-20 06:27:34,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:27:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:27:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:27:35,244 INFO L356 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2022-07-20 06:27:35,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 229 treesize of output 195 [2022-07-20 06:27:35,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:35,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1882 treesize of output 1856 [2022-07-20 06:27:35,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:27:35,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:35,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1840 treesize of output 1416 [2022-07-20 06:27:35,303 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:27:35,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14189 treesize of output 13923 [2022-07-20 06:27:35,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17059 treesize of output 16515 [2022-07-20 06:27:35,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17647 treesize of output 16975