./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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-simple/sll2n_remove_all_reverse.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 b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:00:20,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:00:20,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:00:21,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:00:21,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:00:21,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:00:21,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:00:21,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:00:21,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:00:21,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:00:21,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:00:21,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:00:21,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:00:21,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:00:21,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:00:21,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:00:21,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:00:21,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:00:21,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:00:21,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:00:21,044 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:00:21,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:00:21,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:00:21,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:00:21,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:00:21,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:00:21,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:00:21,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:00:21,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:00:21,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:00:21,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:00:21,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:00:21,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:00:21,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:00:21,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:00:21,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:00:21,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:00:21,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:00:21,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:00:21,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:00:21,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:00:21,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:00:21,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 07:00:21,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:00:21,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:00:21,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:00:21,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:00:21,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:00:21,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:00:21,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:00:21,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:00:21,096 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:00:21,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:00:21,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:00:21,097 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:00:21,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:00:21,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:00:21,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:00:21,098 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:00:21,098 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:00:21,098 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:00:21,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:00:21,100 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:00:21,100 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:00:21,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:00:21,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:00:21,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:00:21,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:00:21,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:00:21,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:00:21,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:00:21,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 07:00:21,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 07:00:21,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2022-07-14 07:00:21,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:00:21,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:00:21,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:00:21,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:00:21,425 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:00:21,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-07-14 07:00:21,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ae335/ff1a225435244bb4ab9c372c4d22f15e/FLAGfd1b2366e [2022-07-14 07:00:21,895 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:00:21,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-07-14 07:00:21,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ae335/ff1a225435244bb4ab9c372c4d22f15e/FLAGfd1b2366e [2022-07-14 07:00:21,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc06ae335/ff1a225435244bb4ab9c372c4d22f15e [2022-07-14 07:00:21,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:00:21,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:00:21,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:00:21,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:00:21,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:00:21,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:00:21" (1/1) ... [2022-07-14 07:00:21,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d21c816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:21, skipping insertion in model container [2022-07-14 07:00:21,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:00:21" (1/1) ... [2022-07-14 07:00:21,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:00:21,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:00:22,247 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-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-07-14 07:00:22,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:00:22,257 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 07:00:22,290 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-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-07-14 07:00:22,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:00:22,318 INFO L208 MainTranslator]: Completed translation [2022-07-14 07:00:22,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22 WrapperNode [2022-07-14 07:00:22,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:00:22,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 07:00:22,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 07:00:22,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 07:00:22,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,370 INFO L137 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2022-07-14 07:00:22,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 07:00:22,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 07:00:22,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 07:00:22,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 07:00:22,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 07:00:22,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 07:00:22,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 07:00:22,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 07:00:22,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (1/1) ... [2022-07-14 07:00:22,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:00:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:22,472 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) [2022-07-14 07:00:22,515 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 [2022-07-14 07:00:22,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 07:00:22,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 07:00:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 07:00:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 07:00:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 07:00:22,616 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 07:00:22,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 07:00:22,864 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 07:00:22,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 07:00:22,879 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 07:00:22,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:00:22 BoogieIcfgContainer [2022-07-14 07:00:22,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 07:00:22,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 07:00:22,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 07:00:22,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 07:00:22,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 07:00:21" (1/3) ... [2022-07-14 07:00:22,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bd74f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:00:22, skipping insertion in model container [2022-07-14 07:00:22,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:00:22" (2/3) ... [2022-07-14 07:00:22,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bd74f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:00:22, skipping insertion in model container [2022-07-14 07:00:22,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:00:22" (3/3) ... [2022-07-14 07:00:22,889 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2022-07-14 07:00:22,903 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 07:00:22,904 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-07-14 07:00:22,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 07:00:22,955 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@445ed908, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4187ce43 [2022-07-14 07:00:22,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-07-14 07:00:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 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) [2022-07-14 07:00:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 07:00:22,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:22,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 07:00:22,968 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)] === [2022-07-14 07:00:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2022-07-14 07:00:22,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084293566] [2022-07-14 07:00:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084293566] [2022-07-14 07:00:23,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084293566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:23,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:23,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839613024] [2022-07-14 07:00:23,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:23,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:23,182 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:23,287 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-07-14 07:00:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-14 07:00:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:23,296 INFO L225 Difference]: With dead ends: 118 [2022-07-14 07:00:23,296 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 07:00:23,297 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 [2022-07-14 07:00:23,300 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:23,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 128 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 07:00:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 68. [2022-07-14 07:00:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.868421052631579) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-07-14 07:00:23,326 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 5 [2022-07-14 07:00:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:23,326 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-07-14 07:00:23,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-07-14 07:00:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 07:00:23,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:23,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 07:00:23,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 07:00:23,328 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)] === [2022-07-14 07:00:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:23,328 INFO L85 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2022-07-14 07:00:23,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:23,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538374749] [2022-07-14 07:00:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538374749] [2022-07-14 07:00:23,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538374749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:23,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:23,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:00:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415167718] [2022-07-14 07:00:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:23,362 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:23,410 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-07-14 07:00:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-14 07:00:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:23,412 INFO L225 Difference]: With dead ends: 120 [2022-07-14 07:00:23,412 INFO L226 Difference]: Without dead ends: 120 [2022-07-14 07:00:23,412 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 [2022-07-14 07:00:23,413 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 65 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:23,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-14 07:00:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 66. [2022-07-14 07:00:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 65 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) [2022-07-14 07:00:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-14 07:00:23,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 5 [2022-07-14 07:00:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:23,419 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-14 07:00:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-14 07:00:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 07:00:23,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:23,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:23,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 07:00:23,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1808567273, now seen corresponding path program 1 times [2022-07-14 07:00:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:23,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290279590] [2022-07-14 07:00:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290279590] [2022-07-14 07:00:23,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290279590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:23,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:23,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:00:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861528003] [2022-07-14 07:00:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:23,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:00:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:00:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:00:23,441 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:23,447 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-14 07:00:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:00:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 07:00:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:23,449 INFO L225 Difference]: With dead ends: 77 [2022-07-14 07:00:23,449 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 07:00:23,449 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 [2022-07-14 07:00:23,450 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 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 [2022-07-14 07:00:23,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 07:00:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-07-14 07:00:23,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-14 07:00:23,454 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 7 [2022-07-14 07:00:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:23,454 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-14 07:00:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-14 07:00:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 07:00:23,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:23,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:23,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 07:00:23,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2022-07-14 07:00:23,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:23,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910082956] [2022-07-14 07:00:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910082956] [2022-07-14 07:00:23,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910082956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:23,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:23,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:00:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803311642] [2022-07-14 07:00:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:00:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:00:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:23,528 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:23,631 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-07-14 07:00:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:00:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 07:00:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:23,632 INFO L225 Difference]: With dead ends: 115 [2022-07-14 07:00:23,632 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 07:00:23,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:23,633 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 161 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:23,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 07:00:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 66. [2022-07-14 07:00:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 65 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) [2022-07-14 07:00:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-14 07:00:23,637 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 9 [2022-07-14 07:00:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:23,638 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-14 07:00:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-14 07:00:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 07:00:23,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:23,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 07:00:23,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2022-07-14 07:00:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595306988] [2022-07-14 07:00:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595306988] [2022-07-14 07:00:23,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595306988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:23,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:23,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:00:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466346306] [2022-07-14 07:00:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:00:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:23,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:00:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:23,697 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:23,757 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-07-14 07:00:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:00:23,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 07:00:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:23,759 INFO L225 Difference]: With dead ends: 70 [2022-07-14 07:00:23,759 INFO L226 Difference]: Without dead ends: 70 [2022-07-14 07:00:23,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:23,760 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 184 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:23,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 42 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-14 07:00:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-07-14 07:00:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-07-14 07:00:23,763 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 9 [2022-07-14 07:00:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-07-14 07:00:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-07-14 07:00:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 07:00:23,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:23,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 07:00:23,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -718760675, now seen corresponding path program 1 times [2022-07-14 07:00:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282898370] [2022-07-14 07:00:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282898370] [2022-07-14 07:00:23,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282898370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915495449] [2022-07-14 07:00:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:23,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:23,823 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) [2022-07-14 07:00:23,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 07:00:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:00:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:23,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:24,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915495449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:24,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:24,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-14 07:00:24,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385457328] [2022-07-14 07:00:24,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:24,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:00:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:00:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:24,009 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:24,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:24,020 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-14 07:00:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:00:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-07-14 07:00:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:24,022 INFO L225 Difference]: With dead ends: 74 [2022-07-14 07:00:24,022 INFO L226 Difference]: Without dead ends: 74 [2022-07-14 07:00:24,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:24,025 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:24,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 184 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-14 07:00:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-14 07:00:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 73 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) [2022-07-14 07:00:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-07-14 07:00:24,039 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 16 [2022-07-14 07:00:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:24,040 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-07-14 07:00:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-07-14 07:00:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:00:24,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:24,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:24,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-14 07:00:24,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 2 times [2022-07-14 07:00:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083977417] [2022-07-14 07:00:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083977417] [2022-07-14 07:00:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083977417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595881545] [2022-07-14 07:00:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:00:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:24,352 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) [2022-07-14 07:00:24,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 07:00:24,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-14 07:00:24,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:00:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 07:00:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:24,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:00:24,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595881545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:24,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:00:24,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-14 07:00:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698989766] [2022-07-14 07:00:24,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:00:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:00:24,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:24,484 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:24,499 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-07-14 07:00:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:00:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 25 [2022-07-14 07:00:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:24,500 INFO L225 Difference]: With dead ends: 117 [2022-07-14 07:00:24,500 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 07:00:24,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:00:24,501 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 142 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 127 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 07:00:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2022-07-14 07:00:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-14 07:00:24,506 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 25 [2022-07-14 07:00:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:24,507 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-14 07:00:24,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-14 07:00:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:00:24,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:24,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:24,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:24,720 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,SelfDestructingSolverStorable6 [2022-07-14 07:00:24,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 1 times [2022-07-14 07:00:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864375193] [2022-07-14 07:00:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:00:24,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864375193] [2022-07-14 07:00:24,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864375193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893214463] [2022-07-14 07:00:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:24,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:24,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:24,864 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) [2022-07-14 07:00:24,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 07:00:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:24,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 07:00:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:24,990 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 [2022-07-14 07:00:25,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:25,009 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 [2022-07-14 07:00:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:25,050 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 [2022-07-14 07:00:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:25,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:25,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893214463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:25,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:25,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-07-14 07:00:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132453671] [2022-07-14 07:00:25,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:00:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:00:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:00:25,177 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:25,283 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-07-14 07:00:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 07:00:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 25 [2022-07-14 07:00:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:25,285 INFO L225 Difference]: With dead ends: 116 [2022-07-14 07:00:25,285 INFO L226 Difference]: Without dead ends: 116 [2022-07-14 07:00:25,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-07-14 07:00:25,286 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:25,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 113 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-14 07:00:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-14 07:00:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2022-07-14 07:00:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.56) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-07-14 07:00:25,289 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 25 [2022-07-14 07:00:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:25,289 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-07-14 07:00:25,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-07-14 07:00:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:00:25,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:25,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:25,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:25,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:25,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307114, now seen corresponding path program 1 times [2022-07-14 07:00:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:25,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638862818] [2022-07-14 07:00:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638862818] [2022-07-14 07:00:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638862818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640203677] [2022-07-14 07:00:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:25,667 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) [2022-07-14 07:00:25,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 07:00:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 07:00:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:25,777 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 [2022-07-14 07:00:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:25,795 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 [2022-07-14 07:00:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:25,844 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 [2022-07-14 07:00:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:25,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640203677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:26,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:26,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-14 07:00:26,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448266351] [2022-07-14 07:00:26,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 07:00:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 07:00:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-14 07:00:26,190 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:26,272 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-07-14 07:00:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:00:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 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 25 [2022-07-14 07:00:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:26,273 INFO L225 Difference]: With dead ends: 99 [2022-07-14 07:00:26,273 INFO L226 Difference]: Without dead ends: 99 [2022-07-14 07:00:26,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:00:26,273 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 361 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:26,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 48 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-14 07:00:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2022-07-14 07:00:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.44) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-07-14 07:00:26,276 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 25 [2022-07-14 07:00:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:26,276 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-07-14 07:00:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-07-14 07:00:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 07:00:26,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:26,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:26,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:26,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912971, now seen corresponding path program 1 times [2022-07-14 07:00:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081882020] [2022-07-14 07:00:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 07:00:26,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081882020] [2022-07-14 07:00:26,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081882020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:26,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:26,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 07:00:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033145018] [2022-07-14 07:00:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:26,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:00:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:00:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:00:26,550 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:26,772 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-07-14 07:00:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:00:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 26 [2022-07-14 07:00:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:26,773 INFO L225 Difference]: With dead ends: 98 [2022-07-14 07:00:26,773 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 07:00:26,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:00:26,774 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 234 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:26,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 229 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 07:00:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-07-14 07:00:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4509803921568627) 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) [2022-07-14 07:00:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-07-14 07:00:26,776 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 26 [2022-07-14 07:00:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:26,776 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-07-14 07:00:26,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-07-14 07:00:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 07:00:26,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:26,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 07:00:26,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912972, now seen corresponding path program 1 times [2022-07-14 07:00:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:26,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329952496] [2022-07-14 07:00:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329952496] [2022-07-14 07:00:26,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329952496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:26,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:26,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 07:00:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053362979] [2022-07-14 07:00:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:26,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:00:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:00:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:00:26,851 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:27,089 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-14 07:00:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 07:00:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-14 07:00:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:27,090 INFO L225 Difference]: With dead ends: 93 [2022-07-14 07:00:27,091 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 07:00:27,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:00:27,092 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 444 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:27,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 132 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 07:00:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-07-14 07:00:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-07-14 07:00:27,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2022-07-14 07:00:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:27,095 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-07-14 07:00:27,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-07-14 07:00:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 07:00:27,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:27,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 07:00:27,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1883258256, now seen corresponding path program 1 times [2022-07-14 07:00:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:27,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059524677] [2022-07-14 07:00:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059524677] [2022-07-14 07:00:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059524677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:27,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 07:00:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14407081] [2022-07-14 07:00:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:00:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:00:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:00:27,159 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-07-14 07:00:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:27,325 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-07-14 07:00:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:00:27,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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 29 [2022-07-14 07:00:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:27,326 INFO L225 Difference]: With dead ends: 69 [2022-07-14 07:00:27,326 INFO L226 Difference]: Without dead ends: 69 [2022-07-14 07:00:27,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:00:27,327 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 325 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:27,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:27,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-14 07:00:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-14 07:00:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-07-14 07:00:27,329 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 29 [2022-07-14 07:00:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:27,329 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-07-14 07:00:27,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) [2022-07-14 07:00:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-07-14 07:00:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 07:00:27,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:27,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 07:00:27,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967250, now seen corresponding path program 1 times [2022-07-14 07:00:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587269603] [2022-07-14 07:00:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:27,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587269603] [2022-07-14 07:00:27,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587269603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:27,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:27,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 07:00:27,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795851218] [2022-07-14 07:00:27,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 07:00:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 07:00:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-14 07:00:27,540 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:27,922 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-07-14 07:00:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 07:00:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-14 07:00:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:27,923 INFO L225 Difference]: With dead ends: 115 [2022-07-14 07:00:27,923 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 07:00:27,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2022-07-14 07:00:27,924 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 533 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:27,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 163 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:00:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 07:00:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-07-14 07:00:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 76 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) [2022-07-14 07:00:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-07-14 07:00:27,926 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 30 [2022-07-14 07:00:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:27,926 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-07-14 07:00:27,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-07-14 07:00:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 07:00:27,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:27,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:27,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 07:00:27,927 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967249, now seen corresponding path program 1 times [2022-07-14 07:00:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:27,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926251883] [2022-07-14 07:00:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:27,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926251883] [2022-07-14 07:00:27,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926251883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:27,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:27,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:00:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913121923] [2022-07-14 07:00:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:27,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:00:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:00:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:00:27,962 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:28,038 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-07-14 07:00:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 07:00:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-14 07:00:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:28,039 INFO L225 Difference]: With dead ends: 77 [2022-07-14 07:00:28,039 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 07:00:28,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:00:28,039 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:28,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 122 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 07:00:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-14 07:00:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.4) 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) [2022-07-14 07:00:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-07-14 07:00:28,041 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 30 [2022-07-14 07:00:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:28,041 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-07-14 07:00:28,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-07-14 07:00:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 07:00:28,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:28,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 07:00:28,042 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1748536300, now seen corresponding path program 1 times [2022-07-14 07:00:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:28,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785149199] [2022-07-14 07:00:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:28,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785149199] [2022-07-14 07:00:28,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785149199] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:28,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:28,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 07:00:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300091081] [2022-07-14 07:00:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:00:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:28,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:00:28,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:00:28,105 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:28,274 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-07-14 07:00:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:00:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-14 07:00:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:28,275 INFO L225 Difference]: With dead ends: 93 [2022-07-14 07:00:28,275 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 07:00:28,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:00:28,276 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 395 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:28,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 117 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 07:00:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2022-07-14 07:00:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.380952380952381) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-07-14 07:00:28,277 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 30 [2022-07-14 07:00:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:28,278 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-07-14 07:00:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-07-14 07:00:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 07:00:28,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:28,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 07:00:28,278 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1629949454, now seen corresponding path program 1 times [2022-07-14 07:00:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:28,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380569908] [2022-07-14 07:00:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:28,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380569908] [2022-07-14 07:00:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380569908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:28,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:28,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:00:28,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297510264] [2022-07-14 07:00:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:00:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:00:28,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:28,320 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:28,370 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-07-14 07:00:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:00:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 31 [2022-07-14 07:00:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:28,371 INFO L225 Difference]: With dead ends: 78 [2022-07-14 07:00:28,371 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 07:00:28,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:00:28,371 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:28,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 116 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 07:00:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-14 07:00:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 77 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) [2022-07-14 07:00:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-07-14 07:00:28,374 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 31 [2022-07-14 07:00:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:28,374 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-07-14 07:00:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-07-14 07:00:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 07:00:28,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:28,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:28,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 07:00:28,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1425315259, now seen corresponding path program 1 times [2022-07-14 07:00:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:28,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908482825] [2022-07-14 07:00:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:28,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:28,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908482825] [2022-07-14 07:00:28,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908482825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323802086] [2022-07-14 07:00:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:28,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:28,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:28,562 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) [2022-07-14 07:00:28,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 07:00:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 07:00:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:28,812 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:28,813 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 57 [2022-07-14 07:00:28,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:28,819 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2022-07-14 07:00:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:28,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:00:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323802086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:28,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:00:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2022-07-14 07:00:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772252056] [2022-07-14 07:00:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:28,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:00:28,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:00:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-07-14 07:00:28,848 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2022-07-14 07:00:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:28,923 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-07-14 07:00:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 07:00:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 32 [2022-07-14 07:00:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:28,925 INFO L225 Difference]: With dead ends: 78 [2022-07-14 07:00:28,925 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 07:00:28,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-07-14 07:00:28,926 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 258 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-07-14 07:00:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 07:00:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-07-14 07:00:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-07-14 07:00:28,927 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 32 [2022-07-14 07:00:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:28,927 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-07-14 07:00:28,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2022-07-14 07:00:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-07-14 07:00:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 07:00:28,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:28,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:28,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:29,139 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,SelfDestructingSolverStorable16 [2022-07-14 07:00:29,139 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:29,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1011174575, now seen corresponding path program 1 times [2022-07-14 07:00:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945162501] [2022-07-14 07:00:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:29,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945162501] [2022-07-14 07:00:29,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945162501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241898887] [2022-07-14 07:00:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:29,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:29,292 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) [2022-07-14 07:00:29,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 07:00:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:00:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:29,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:29,452 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 [2022-07-14 07:00:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:29,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:00:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241898887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:29,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:00:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-07-14 07:00:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080858357] [2022-07-14 07:00:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:29,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 07:00:29,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 07:00:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-14 07:00:29,454 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-14 07:00:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:29,538 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-07-14 07:00:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:00:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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 32 [2022-07-14 07:00:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:29,538 INFO L225 Difference]: With dead ends: 84 [2022-07-14 07:00:29,538 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 07:00:29,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:00:29,539 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:29,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 91 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:00:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 07:00:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-07-14 07:00:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 75 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) [2022-07-14 07:00:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-07-14 07:00:29,541 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 32 [2022-07-14 07:00:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:29,541 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-07-14 07:00:29,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-07-14 07:00:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-07-14 07:00:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 07:00:29,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:29,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:29,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:29,755 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,SelfDestructingSolverStorable17 [2022-07-14 07:00:29,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:29,756 INFO L85 PathProgramCache]: Analyzing trace with hash -366548792, now seen corresponding path program 1 times [2022-07-14 07:00:29,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:29,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077894272] [2022-07-14 07:00:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:29,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:30,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077894272] [2022-07-14 07:00:30,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077894272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018446157] [2022-07-14 07:00:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:30,051 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) [2022-07-14 07:00:30,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 07:00:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 07:00:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:30,315 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 07:00:30,315 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 14 treesize of output 20 [2022-07-14 07:00:30,445 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 [2022-07-14 07:00:30,449 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 [2022-07-14 07:00:30,756 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-07-14 07:00:30,756 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 43 [2022-07-14 07:00:30,764 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 07:00:30,764 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-07-14 07:00:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:30,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:31,258 INFO L356 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-07-14 07:00:31,258 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 382 treesize of output 353 [2022-07-14 07:00:31,338 INFO L356 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-07-14 07:00:31,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 884 treesize of output 811 [2022-07-14 07:00:31,833 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 37 treesize of output 33 [2022-07-14 07:00:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:31,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018446157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:31,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:31,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 50 [2022-07-14 07:00:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443084964] [2022-07-14 07:00:31,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 07:00:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 07:00:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 07:00:31,941 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 51 states, 50 states have (on average 1.98) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:33,132 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2022-07-14 07:00:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 07:00:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.98) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 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 34 [2022-07-14 07:00:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:33,133 INFO L225 Difference]: With dead ends: 149 [2022-07-14 07:00:33,133 INFO L226 Difference]: Without dead ends: 149 [2022-07-14 07:00:33,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=570, Invalid=3720, Unknown=0, NotChecked=0, Total=4290 [2022-07-14 07:00:33,134 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1142 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:33,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 694 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 654 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2022-07-14 07:00:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-14 07:00:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 82. [2022-07-14 07:00:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.338235294117647) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-07-14 07:00:33,136 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 34 [2022-07-14 07:00:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:33,136 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-07-14 07:00:33,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.98) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-07-14 07:00:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 07:00:33,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:33,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:33,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:33,337 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 [2022-07-14 07:00:33,338 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -366548793, now seen corresponding path program 1 times [2022-07-14 07:00:33,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:33,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124672846] [2022-07-14 07:00:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124672846] [2022-07-14 07:00:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124672846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222437743] [2022-07-14 07:00:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:33,554 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) [2022-07-14 07:00:33,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 07:00:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 07:00:33,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:33,720 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 [2022-07-14 07:00:33,736 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 07:00:33,736 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 [2022-07-14 07:00:33,845 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 [2022-07-14 07:00:34,081 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 [2022-07-14 07:00:34,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 07:00:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:34,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:34,232 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:34,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 19 [2022-07-14 07:00:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:34,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:34,358 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 43 treesize of output 31 [2022-07-14 07:00:34,526 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:34,526 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 191 treesize of output 197 [2022-07-14 07:00:36,459 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 07:00:36,459 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 30 treesize of output 1 [2022-07-14 07:00:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:36,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222437743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:36,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:36,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-07-14 07:00:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549859774] [2022-07-14 07:00:36,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 07:00:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 07:00:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 07:00:36,462 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:37,167 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2022-07-14 07:00:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:00:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 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 34 [2022-07-14 07:00:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:37,167 INFO L225 Difference]: With dead ends: 82 [2022-07-14 07:00:37,167 INFO L226 Difference]: Without dead ends: 82 [2022-07-14 07:00:37,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 07:00:37,169 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 73 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:37,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 505 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 471 Invalid, 0 Unknown, 415 Unchecked, 0.2s Time] [2022-07-14 07:00:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-14 07:00:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-14 07:00:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-07-14 07:00:37,170 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 34 [2022-07-14 07:00:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:37,170 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-07-14 07:00:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-07-14 07:00:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 07:00:37,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:37,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:37,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-14 07:00:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:37,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash -66070095, now seen corresponding path program 1 times [2022-07-14 07:00:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380583839] [2022-07-14 07:00:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 07:00:37,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:37,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380583839] [2022-07-14 07:00:37,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380583839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:37,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227759568] [2022-07-14 07:00:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:37,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:37,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:37,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:37,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 07:00:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 07:00:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:37,589 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 7 treesize of output 3 [2022-07-14 07:00:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:37,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227759568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:37,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:37,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 11 [2022-07-14 07:00:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468930179] [2022-07-14 07:00:37,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:37,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 07:00:37,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 07:00:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-14 07:00:37,603 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:37,908 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-07-14 07:00:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 07:00:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 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 36 [2022-07-14 07:00:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:37,909 INFO L225 Difference]: With dead ends: 97 [2022-07-14 07:00:37,909 INFO L226 Difference]: Without dead ends: 97 [2022-07-14 07:00:37,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-07-14 07:00:37,910 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:37,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 209 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:00:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-14 07:00:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2022-07-14 07:00:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-14 07:00:37,913 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 36 [2022-07-14 07:00:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:37,913 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-14 07:00:37,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-14 07:00:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 07:00:37,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:37,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:37,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:38,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -66070094, now seen corresponding path program 1 times [2022-07-14 07:00:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:38,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741200428] [2022-07-14 07:00:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:00:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741200428] [2022-07-14 07:00:38,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741200428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765025699] [2022-07-14 07:00:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:38,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:38,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 07:00:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 07:00:38,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:38,339 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 7 treesize of output 3 [2022-07-14 07:00:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:38,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765025699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:38,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:38,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2022-07-14 07:00:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753602681] [2022-07-14 07:00:38,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 07:00:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 07:00:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:00:38,389 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:38,875 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-07-14 07:00:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:00:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-14 07:00:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:38,878 INFO L225 Difference]: With dead ends: 112 [2022-07-14 07:00:38,878 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 07:00:38,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-07-14 07:00:38,879 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 475 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:38,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 174 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:00:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 07:00:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-07-14 07:00:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 77 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) [2022-07-14 07:00:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-07-14 07:00:38,887 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 36 [2022-07-14 07:00:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:38,887 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-07-14 07:00:38,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-07-14 07:00:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 07:00:38,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:38,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:38,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:39,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-14 07:00:39,105 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -897341486, now seen corresponding path program 1 times [2022-07-14 07:00:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864343104] [2022-07-14 07:00:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:39,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:00:39,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:39,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864343104] [2022-07-14 07:00:39,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864343104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:00:39,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:00:39,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:00:39,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807757603] [2022-07-14 07:00:39,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:00:39,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:00:39,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:00:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:00:39,146 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:39,168 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-07-14 07:00:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:00:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 36 [2022-07-14 07:00:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:39,169 INFO L225 Difference]: With dead ends: 83 [2022-07-14 07:00:39,169 INFO L226 Difference]: Without dead ends: 83 [2022-07-14 07:00:39,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:00:39,170 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:39,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 42 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:00:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-14 07:00:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-14 07:00:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.25) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-14 07:00:39,172 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 36 [2022-07-14 07:00:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:39,172 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-14 07:00:39,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-14 07:00:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:00:39,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:39,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:39,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-14 07:00:39,173 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2047782270, now seen corresponding path program 1 times [2022-07-14 07:00:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:39,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089119263] [2022-07-14 07:00:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:39,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:39,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089119263] [2022-07-14 07:00:39,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089119263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:39,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816261773] [2022-07-14 07:00:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:39,394 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:39,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 07:00:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 07:00:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:39,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-14 07:00:39,837 INFO L356 Elim1Store]: treesize reduction 6, result has 83.8 percent of original size [2022-07-14 07:00:39,838 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2022-07-14 07:00:39,880 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 16 treesize of output 8 [2022-07-14 07:00:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:39,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:39,915 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 27 treesize of output 19 [2022-07-14 07:00:40,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:40,022 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 137 treesize of output 147 [2022-07-14 07:00:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:40,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816261773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:40,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:40,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 40 [2022-07-14 07:00:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047783272] [2022-07-14 07:00:40,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 07:00:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 07:00:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 07:00:40,219 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 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) [2022-07-14 07:00:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:41,007 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-07-14 07:00:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 07:00:41,007 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-14 07:00:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:41,008 INFO L225 Difference]: With dead ends: 94 [2022-07-14 07:00:41,008 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 07:00:41,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 07:00:41,012 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 666 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:41,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 593 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 584 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-07-14 07:00:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 07:00:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-07-14 07:00:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 79 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) [2022-07-14 07:00:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-07-14 07:00:41,019 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 37 [2022-07-14 07:00:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:41,019 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-07-14 07:00:41,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 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) [2022-07-14 07:00:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-07-14 07:00:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 07:00:41,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:41,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:41,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:41,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-14 07:00:41,224 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 931150289, now seen corresponding path program 1 times [2022-07-14 07:00:41,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027223549] [2022-07-14 07:00:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027223549] [2022-07-14 07:00:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027223549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130550820] [2022-07-14 07:00:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:41,430 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:41,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 07:00:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:41,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-14 07:00:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:41,676 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 [2022-07-14 07:00:41,804 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 25 treesize of output 17 [2022-07-14 07:00:41,877 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:41,878 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2022-07-14 07:00:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:41,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:41,999 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 28 treesize of output 20 [2022-07-14 07:00:42,122 INFO L356 Elim1Store]: treesize reduction 13, result has 62.9 percent of original size [2022-07-14 07:00:42,122 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 120 treesize of output 117 [2022-07-14 07:00:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130550820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:00:42,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:00:42,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 35 [2022-07-14 07:00:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278630302] [2022-07-14 07:00:42,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:42,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 07:00:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:00:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 07:00:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 07:00:42,208 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 36 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:42,964 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-14 07:00:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:00:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 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 38 [2022-07-14 07:00:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:42,965 INFO L225 Difference]: With dead ends: 93 [2022-07-14 07:00:42,965 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 07:00:42,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=2036, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 07:00:42,967 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 200 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:42,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 489 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 586 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-07-14 07:00:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 07:00:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2022-07-14 07:00:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-07-14 07:00:42,968 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 38 [2022-07-14 07:00:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:42,969 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-07-14 07:00:42,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 07:00:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-07-14 07:00:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-14 07:00:42,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:42,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:42,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:43,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-14 07:00:43,187 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-07-14 07:00:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash 931202878, now seen corresponding path program 2 times [2022-07-14 07:00:43,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:00:43,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359345661] [2022-07-14 07:00:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:00:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:43,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:00:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359345661] [2022-07-14 07:00:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359345661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206013261] [2022-07-14 07:00:43,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:00:43,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:00:43,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:00:43,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 07:00:43,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 07:00:43,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:00:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:00:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-14 07:00:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:43,784 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 [2022-07-14 07:00:43,879 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 [2022-07-14 07:00:43,884 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 [2022-07-14 07:00:43,961 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 [2022-07-14 07:00:43,972 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:00:43,972 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 [2022-07-14 07:00:44,015 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 16 treesize of output 18 [2022-07-14 07:00:44,020 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 16 treesize of output 18 [2022-07-14 07:00:44,029 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 16 treesize of output 18 [2022-07-14 07:00:44,035 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 16 treesize of output 18 [2022-07-14 07:00:44,122 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 23 treesize of output 22 [2022-07-14 07:00:44,125 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 29 treesize of output 28 [2022-07-14 07:00:44,750 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-14 07:00:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:45,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:45,082 INFO L356 Elim1Store]: treesize reduction 85, result has 18.3 percent of original size [2022-07-14 07:00:45,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 98 [2022-07-14 07:00:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:45,100 INFO L356 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-07-14 07:00:45,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 48 [2022-07-14 07:00:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:45,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:57,269 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:57,269 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 198 [2022-07-14 07:00:57,274 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:57,275 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 157 [2022-07-14 07:00:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:01:00,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:01:00,520 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 339 treesize of output 241 [2022-07-14 07:01:00,527 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:01:00,527 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 264 treesize of output 152 [2022-07-14 07:01:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:01:00,863 INFO L356 Elim1Store]: treesize reduction 299, result has 62.9 percent of original size [2022-07-14 07:01:00,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 720 treesize of output 963 [2022-07-14 07:01:06,350 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 690 DAG size of output: 481 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-07-14 07:01:06,352 INFO L356 Elim1Store]: treesize reduction 1177, result has 61.3 percent of original size [2022-07-14 07:01:06,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 3606 treesize of output 4449 [2022-07-14 07:01:08,382 INFO L356 Elim1Store]: treesize reduction 78, result has 79.4 percent of original size [2022-07-14 07:01:08,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 4094 treesize of output 3708 [2022-07-14 07:01:09,157 INFO L244 Elim1Store]: Index analysis took 120 ms [2022-07-14 07:01:10,014 INFO L356 Elim1Store]: treesize reduction 86, result has 77.3 percent of original size [2022-07-14 07:01:10,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 2980 treesize of output 2846