./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.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 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:21:15,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:21:15,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:21:15,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:21:15,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:21:15,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:21:15,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:21:15,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:21:15,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:21:15,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:21:15,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:21:15,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:21:15,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:21:15,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:21:15,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:21:15,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:21:15,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:21:15,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:21:15,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:21:15,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:21:15,587 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:21:15,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:21:15,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:21:15,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:21:15,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:21:15,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:21:15,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:21:15,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:21:15,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:21:15,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:21:15,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:21:15,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:21:15,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:21:15,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:21:15,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:21:15,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:21:15,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:21:15,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:21:15,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:21:15,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:21:15,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:21:15,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:21:15,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 19:21:15,628 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:21:15,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:21:15,629 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:21:15,629 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:21:15,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:21:15,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:21:15,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:21:15,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:21:15,630 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:21:15,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:21:15,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:21:15,631 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:21:15,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:21:15,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:21:15,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:21:15,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:21:15,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:21:15,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:21:15,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 19:21:15,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 19:21:15,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fb6aa6206205a747f158782e93b3c9333c1a2cdc4e8dab70046fca960e31961 [2022-07-12 19:21:15,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:21:15,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:21:15,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:21:15,860 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:21:15,862 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:21:15,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2022-07-12 19:21:15,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c08c0bbf/5f15517538e041d2816cb806394b6fb7/FLAG2c5cb2b79 [2022-07-12 19:21:16,329 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:21:16,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2022-07-12 19:21:16,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c08c0bbf/5f15517538e041d2816cb806394b6fb7/FLAG2c5cb2b79 [2022-07-12 19:21:16,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c08c0bbf/5f15517538e041d2816cb806394b6fb7 [2022-07-12 19:21:16,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:21:16,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:21:16,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:21:16,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:21:16,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:21:16,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704a6c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16, skipping insertion in model container [2022-07-12 19:21:16,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:21:16,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:21:16,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2022-07-12 19:21:16,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:21:16,613 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:21:16,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i[24211,24224] [2022-07-12 19:21:16,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:21:16,681 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:21:16,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16 WrapperNode [2022-07-12 19:21:16,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:21:16,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:21:16,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:21:16,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:21:16,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,730 INFO L137 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2022-07-12 19:21:16,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:21:16,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:21:16,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:21:16,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:21:16,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:21:16,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:21:16,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:21:16,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:21:16,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (1/1) ... [2022-07-12 19:21:16,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:21:16,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:16,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 19:21:16,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-07-12 19:21:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:21:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 19:21:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:21:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:21:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 19:21:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:21:16,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:21:16,914 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:21:16,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:21:16,948 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-07-12 19:21:17,130 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:21:17,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:21:17,135 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 19:21:17,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:21:17 BoogieIcfgContainer [2022-07-12 19:21:17,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:21:17,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:21:17,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:21:17,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:21:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:21:16" (1/3) ... [2022-07-12 19:21:17,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e2cd50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:21:17, skipping insertion in model container [2022-07-12 19:21:17,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:21:16" (2/3) ... [2022-07-12 19:21:17,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e2cd50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:21:17, skipping insertion in model container [2022-07-12 19:21:17,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:21:17" (3/3) ... [2022-07-12 19:21:17,143 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2022-07-12 19:21:17,154 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:21:17,154 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2022-07-12 19:21:17,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:21:17,192 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@51f0fe81, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5916071d [2022-07-12 19:21:17,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-07-12 19:21:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 19:21:17,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:17,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 19:21:17,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2022-07-12 19:21:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614669729] [2022-07-12 19:21:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:17,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614669729] [2022-07-12 19:21:17,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614669729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:17,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:17,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:21:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426320963] [2022-07-12 19:21:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:17,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:21:17,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:21:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,402 INFO L87 Difference]: Start difference. First operand has 80 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:17,501 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-07-12 19:21:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:21:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-12 19:21:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:17,509 INFO L225 Difference]: With dead ends: 93 [2022-07-12 19:21:17,510 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 19:21:17,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,517 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:17,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 62 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 19:21:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2022-07-12 19:21:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.8717948717948718) 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) [2022-07-12 19:21:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-07-12 19:21:17,549 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 4 [2022-07-12 19:21:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:17,550 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-07-12 19:21:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-07-12 19:21:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-12 19:21:17,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:17,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-12 19:21:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 19:21:17,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2022-07-12 19:21:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626528153] [2022-07-12 19:21:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:17,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626528153] [2022-07-12 19:21:17,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626528153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:17,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:17,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:21:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541662290] [2022-07-12 19:21:17,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:21:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:21:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,613 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:17,657 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-12 19:21:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:21:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-12 19:21:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:17,658 INFO L225 Difference]: With dead ends: 66 [2022-07-12 19:21:17,658 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 19:21:17,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,660 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:17,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:21:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 19:21:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-12 19:21:17,667 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) [2022-07-12 19:21:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-12 19:21:17,669 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 4 [2022-07-12 19:21:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:17,671 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-12 19:21:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-12 19:21:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 19:21:17,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:17,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:17,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 19:21:17,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -401980428, now seen corresponding path program 1 times [2022-07-12 19:21:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:17,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885476317] [2022-07-12 19:21:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885476317] [2022-07-12 19:21:17,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885476317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:17,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:17,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:21:17,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486622999] [2022-07-12 19:21:17,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:21:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:21:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,743 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:17,817 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2022-07-12 19:21:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:21:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 19:21:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:17,818 INFO L225 Difference]: With dead ends: 108 [2022-07-12 19:21:17,818 INFO L226 Difference]: Without dead ends: 108 [2022-07-12 19:21:17,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,820 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:17,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 118 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-12 19:21:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 64. [2022-07-12 19:21:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-12 19:21:17,824 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 10 [2022-07-12 19:21:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-12 19:21:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-12 19:21:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 19:21:17,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:17,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:17,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 19:21:17,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash -401980427, now seen corresponding path program 1 times [2022-07-12 19:21:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886348061] [2022-07-12 19:21:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886348061] [2022-07-12 19:21:17,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886348061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:17,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:17,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:21:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841052942] [2022-07-12 19:21:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:21:17,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:21:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,905 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:17,954 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-07-12 19:21:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:21:17,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 19:21:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:17,956 INFO L225 Difference]: With dead ends: 110 [2022-07-12 19:21:17,956 INFO L226 Difference]: Without dead ends: 110 [2022-07-12 19:21:17,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:17,957 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 56 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:17,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 127 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:21:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-12 19:21:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 62. [2022-07-12 19:21:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-07-12 19:21:17,961 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 10 [2022-07-12 19:21:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:17,961 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-07-12 19:21:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-07-12 19:21:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 19:21:17,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:17,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:17,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 19:21:17,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -401981869, now seen corresponding path program 1 times [2022-07-12 19:21:17,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:17,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936846597] [2022-07-12 19:21:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936846597] [2022-07-12 19:21:17,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936846597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:18,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:18,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:21:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144595047] [2022-07-12 19:21:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:18,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:21:18,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:21:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:18,001 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:18,006 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-07-12 19:21:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:21:18,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 19:21:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:18,007 INFO L225 Difference]: With dead ends: 70 [2022-07-12 19:21:18,007 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 19:21:18,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:21:18,008 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 119 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 [2022-07-12 19:21:18,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 119 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:21:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 19:21:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-07-12 19:21:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.65) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-12 19:21:18,016 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 10 [2022-07-12 19:21:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:18,017 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-12 19:21:18,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-12 19:21:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 19:21:18,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:18,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 19:21:18,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 243865783, now seen corresponding path program 1 times [2022-07-12 19:21:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:18,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894677893] [2022-07-12 19:21:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894677893] [2022-07-12 19:21:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894677893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:18,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:18,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:21:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449347557] [2022-07-12 19:21:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:21:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:18,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:21:18,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:21:18,093 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:18,158 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-07-12 19:21:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:21:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 19:21:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:18,159 INFO L225 Difference]: With dead ends: 85 [2022-07-12 19:21:18,159 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 19:21:18,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:21:18,160 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 62 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 19:21:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-07-12 19:21:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 66 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) [2022-07-12 19:21:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-12 19:21:18,163 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 12 [2022-07-12 19:21:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:18,164 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-12 19:21:18,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-12 19:21:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 19:21:18,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:18,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 19:21:18,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash 243865784, now seen corresponding path program 1 times [2022-07-12 19:21:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:18,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048121967] [2022-07-12 19:21:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048121967] [2022-07-12 19:21:18,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048121967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:18,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:18,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:21:18,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564449960] [2022-07-12 19:21:18,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:18,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:21:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:21:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:21:18,231 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:18,324 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-07-12 19:21:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:21:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 19:21:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:18,325 INFO L225 Difference]: With dead ends: 85 [2022-07-12 19:21:18,325 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 19:21:18,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:21:18,326 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 87 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 84 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 19:21:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-07-12 19:21:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5909090909090908) 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) [2022-07-12 19:21:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-12 19:21:18,329 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 12 [2022-07-12 19:21:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:18,329 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-12 19:21:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-12 19:21:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 19:21:18,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:18,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:18,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 19:21:18,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash -27720857, now seen corresponding path program 1 times [2022-07-12 19:21:18,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506104795] [2022-07-12 19:21:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506104795] [2022-07-12 19:21:18,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506104795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341668839] [2022-07-12 19:21:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:18,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:18,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:21:18,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 19:21:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:21:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341668839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:18,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:18,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-12 19:21:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803837169] [2022-07-12 19:21:18,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:18,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:21:18,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:21:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:21:18,530 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:18,541 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2022-07-12 19:21:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:21:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 19:21:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:18,542 INFO L225 Difference]: With dead ends: 85 [2022-07-12 19:21:18,542 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 19:21:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:21:18,543 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 33 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:18,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 231 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:21:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 19:21:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-07-12 19:21:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.5172413793103448) 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) [2022-07-12 19:21:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-12 19:21:18,546 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 16 [2022-07-12 19:21:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:18,547 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-12 19:21:18,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-12 19:21:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 19:21:18,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:18,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:18,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:18,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:18,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash -868554549, now seen corresponding path program 1 times [2022-07-12 19:21:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816273345] [2022-07-12 19:21:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816273345] [2022-07-12 19:21:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816273345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:18,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4394039] [2022-07-12 19:21:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:18,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:21:18,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 19:21:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:21:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:18,946 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 [2022-07-12 19:21:18,982 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:21:18,982 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 [2022-07-12 19:21:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:18,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4394039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:19,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:19,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-12 19:21:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168042644] [2022-07-12 19:21:19,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:19,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:21:19,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:21:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:21:19,080 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:19,150 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-07-12 19:21:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:21:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-12 19:21:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:19,151 INFO L225 Difference]: With dead ends: 96 [2022-07-12 19:21:19,151 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 19:21:19,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:21:19,153 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:19,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 114 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-12 19:21:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 19:21:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2022-07-12 19:21:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 78 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) [2022-07-12 19:21:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-07-12 19:21:19,161 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 18 [2022-07-12 19:21:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:19,161 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-07-12 19:21:19,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-07-12 19:21:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 19:21:19,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:19,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:19,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 19:21:19,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -868554548, now seen corresponding path program 1 times [2022-07-12 19:21:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177863310] [2022-07-12 19:21:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177863310] [2022-07-12 19:21:19,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177863310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283850035] [2022-07-12 19:21:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:19,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:19,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:19,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:21:19,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 19:21:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:21:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:19,514 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 [2022-07-12 19:21:19,518 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 [2022-07-12 19:21:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:19,558 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 [2022-07-12 19:21:19,565 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:21:19,565 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 [2022-07-12 19:21:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:19,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:19,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283850035] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:19,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:19,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-07-12 19:21:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236365520] [2022-07-12 19:21:19,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:19,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:21:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:19,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:21:19,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:21:19,764 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:19,925 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-07-12 19:21:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:21:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-12 19:21:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:19,926 INFO L225 Difference]: With dead ends: 94 [2022-07-12 19:21:19,926 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 19:21:19,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-12 19:21:19,927 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 323 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:19,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 75 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 86 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-07-12 19:21:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 19:21:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-07-12 19:21:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-07-12 19:21:19,941 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 18 [2022-07-12 19:21:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:19,941 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-07-12 19:21:19,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-07-12 19:21:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 19:21:19,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:19,942 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:19,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:20,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 140768543, now seen corresponding path program 1 times [2022-07-12 19:21:20,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438118798] [2022-07-12 19:21:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:21:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438118798] [2022-07-12 19:21:20,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438118798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:20,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:20,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:21:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838115493] [2022-07-12 19:21:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:20,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:21:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:21:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:21:20,237 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:20,334 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-07-12 19:21:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:21:20,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-12 19:21:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:20,336 INFO L225 Difference]: With dead ends: 90 [2022-07-12 19:21:20,336 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 19:21:20,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:21:20,337 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:20,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 76 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 19:21:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2022-07-12 19:21:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.3220338983050848) 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) [2022-07-12 19:21:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-07-12 19:21:20,343 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 37 [2022-07-12 19:21:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:20,344 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-07-12 19:21:20,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-07-12 19:21:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 19:21:20,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:20,345 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 19:21:20,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 140768544, now seen corresponding path program 1 times [2022-07-12 19:21:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:20,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307222646] [2022-07-12 19:21:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:20,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 19:21:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:20,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307222646] [2022-07-12 19:21:20,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307222646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:20,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:20,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 19:21:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304865992] [2022-07-12 19:21:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:21:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:21:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:21:20,443 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:20,540 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-07-12 19:21:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:21:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-12 19:21:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:20,543 INFO L225 Difference]: With dead ends: 80 [2022-07-12 19:21:20,543 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 19:21:20,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:21:20,544 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:20,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 54 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 19:21:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-07-12 19:21:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-12 19:21:20,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 37 [2022-07-12 19:21:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:20,548 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-12 19:21:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-12 19:21:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 19:21:20,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:20,549 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:20,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 19:21:20,550 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:20,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2134585018, now seen corresponding path program 1 times [2022-07-12 19:21:20,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:20,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174266625] [2022-07-12 19:21:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:20,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 19:21:20,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174266625] [2022-07-12 19:21:20,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174266625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613621501] [2022-07-12 19:21:20,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:20,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:20,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:20,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 19:21:20,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 19:21:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 19:21:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:21,035 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 [2022-07-12 19:21:21,116 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:21:21,116 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 [2022-07-12 19:21:21,156 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 [2022-07-12 19:21:21,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:21:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:21,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:21,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:21,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:21,325 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 [2022-07-12 19:21:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:21:21,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:23,354 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-12 19:21:24,042 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-12 19:21:24,054 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-12 19:21:24,061 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:24,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-12 19:21:24,075 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:24,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 214 [2022-07-12 19:21:24,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 234 [2022-07-12 19:21:24,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-12 19:21:24,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-12 19:21:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2022-07-12 19:21:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613621501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:24,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:24,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-07-12 19:21:24,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675506320] [2022-07-12 19:21:24,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 19:21:24,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 19:21:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=675, Unknown=3, NotChecked=162, Total=930 [2022-07-12 19:21:24,479 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 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) [2022-07-12 19:21:24,649 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) is different from false [2022-07-12 19:21:24,985 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-12 19:21:25,323 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-12 19:21:25,353 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_911 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (= |c_ULTIMATE.start_main_~data_init~0#1| |c_ULTIMATE.start_dll_circular_create_~data#1|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) is different from false [2022-07-12 19:21:26,205 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_911 Int) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_911)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_main_~data_init~0#1|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |c_ULTIMATE.start_main_~data_init~0#1| 1) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-07-12 19:21:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:26,341 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-12 19:21:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:21:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 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) Word has length 39 [2022-07-12 19:21:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:26,342 INFO L225 Difference]: With dead ends: 77 [2022-07-12 19:21:26,342 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 19:21:26,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=185, Invalid=1099, Unknown=8, NotChecked=600, Total=1892 [2022-07-12 19:21:26,344 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:26,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 665 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 393 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-07-12 19:21:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 19:21:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-07-12 19:21:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-07-12 19:21:26,346 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 39 [2022-07-12 19:21:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:26,346 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-07-12 19:21:26,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 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) [2022-07-12 19:21:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-07-12 19:21:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:21:26,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:26,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:26,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:26,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash -56889687, now seen corresponding path program 1 times [2022-07-12 19:21:26,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:26,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989082907] [2022-07-12 19:21:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:26,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:21:26,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989082907] [2022-07-12 19:21:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989082907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:26,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:26,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:21:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093909668] [2022-07-12 19:21:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:21:26,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:26,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:21:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:21:26,643 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:26,759 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-12 19:21:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:21:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 19:21:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:26,760 INFO L225 Difference]: With dead ends: 92 [2022-07-12 19:21:26,760 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 19:21:26,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:21:26,761 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:26,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 91 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 19:21:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2022-07-12 19:21:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.2580645161290323) 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) [2022-07-12 19:21:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-07-12 19:21:26,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 43 [2022-07-12 19:21:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:26,762 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-07-12 19:21:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-07-12 19:21:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:21:26,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:26,763 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 19:21:26,763 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -56889686, now seen corresponding path program 1 times [2022-07-12 19:21:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434790365] [2022-07-12 19:21:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 19:21:26,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434790365] [2022-07-12 19:21:26,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434790365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:21:26,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:21:26,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 19:21:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482903446] [2022-07-12 19:21:26,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:21:26,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:21:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:21:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:21:26,861 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:26,991 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-07-12 19:21:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:21:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 19:21:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:26,992 INFO L225 Difference]: With dead ends: 76 [2022-07-12 19:21:26,992 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 19:21:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:21:26,993 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:26,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 77 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:21:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 19:21:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-07-12 19:21:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-07-12 19:21:26,994 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 43 [2022-07-12 19:21:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:26,995 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-07-12 19:21:26,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-07-12 19:21:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:21:26,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:26,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 19:21:26,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:26,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:26,996 INFO L85 PathProgramCache]: Analyzing trace with hash -56889649, now seen corresponding path program 1 times [2022-07-12 19:21:26,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:26,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450829512] [2022-07-12 19:21:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 19:21:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450829512] [2022-07-12 19:21:27,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450829512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014481436] [2022-07-12 19:21:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:27,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:27,254 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) [2022-07-12 19:21:27,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 19:21:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-12 19:21:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:27,417 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 [2022-07-12 19:21:27,509 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:21:27,509 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 [2022-07-12 19:21:27,545 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 [2022-07-12 19:21:27,555 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 [2022-07-12 19:21:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:27,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:27,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:27,612 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:21:27,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-07-12 19:21:27,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 19:21:27,696 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:21:27,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-12 19:21:27,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-12 19:21:27,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:27,714 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:21:27,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-07-12 19:21:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:27,775 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:27,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2022-07-12 19:21:27,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:27,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-12 19:21:28,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:28,015 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:28,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 75 [2022-07-12 19:21:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:28,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 85 [2022-07-12 19:21:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:28,067 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:28,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2022-07-12 19:21:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:28,073 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:28,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2022-07-12 19:21:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:21:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:30,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:30,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:30,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2022-07-12 19:21:30,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:30,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:30,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2022-07-12 19:21:30,950 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:30,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 178 [2022-07-12 19:21:30,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 182 [2022-07-12 19:21:30,963 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 70 treesize of output 58 [2022-07-12 19:21:30,971 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 54 treesize of output 46 [2022-07-12 19:21:30,978 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 24 treesize of output 20 [2022-07-12 19:21:31,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2022-07-12 19:21:31,051 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 164 treesize of output 148 [2022-07-12 19:21:31,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:31,137 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:31,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 71 [2022-07-12 19:21:31,148 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:31,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 323 [2022-07-12 19:21:31,158 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 367 treesize of output 335 [2022-07-12 19:21:31,211 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 207 treesize of output 191 [2022-07-12 19:21:31,269 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 173 treesize of output 157 [2022-07-12 19:21:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:21:33,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014481436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:33,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:33,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2022-07-12 19:21:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160679222] [2022-07-12 19:21:33,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:33,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 19:21:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 19:21:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1644, Unknown=6, NotChecked=0, Total=1806 [2022-07-12 19:21:33,780 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:34,990 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-12 19:21:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:21:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 19:21:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:34,991 INFO L225 Difference]: With dead ends: 100 [2022-07-12 19:21:34,991 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 19:21:34,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=489, Invalid=2811, Unknown=6, NotChecked=0, Total=3306 [2022-07-12 19:21:34,993 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 292 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:34,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 546 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 532 Invalid, 0 Unknown, 317 Unchecked, 0.3s Time] [2022-07-12 19:21:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 19:21:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2022-07-12 19:21:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.2461538461538462) 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) [2022-07-12 19:21:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-07-12 19:21:34,994 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 43 [2022-07-12 19:21:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:34,994 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-07-12 19:21:34,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-07-12 19:21:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 19:21:34,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:34,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:35,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 19:21:35,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -56889648, now seen corresponding path program 1 times [2022-07-12 19:21:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:35,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925992535] [2022-07-12 19:21:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 19:21:35,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925992535] [2022-07-12 19:21:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925992535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946802093] [2022-07-12 19:21:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:35,595 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) [2022-07-12 19:21:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 19:21:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-12 19:21:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:35,764 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 [2022-07-12 19:21:35,825 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:21:35,826 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 [2022-07-12 19:21:35,854 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 [2022-07-12 19:21:35,858 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 [2022-07-12 19:21:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:35,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:35,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:35,919 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:21:35,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-07-12 19:21:35,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-07-12 19:21:36,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,007 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:21:36,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-07-12 19:21:36,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,018 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:21:36,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-07-12 19:21:36,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:36,105 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:36,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 84 [2022-07-12 19:21:36,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:36,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,112 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-07-12 19:21:36,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 96 [2022-07-12 19:21:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:36,338 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:36,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 76 [2022-07-12 19:21:36,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:36,343 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:36,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-07-12 19:21:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,383 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:36,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 66 [2022-07-12 19:21:36,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:36,394 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-12 19:21:36,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 64 [2022-07-12 19:21:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:21:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:36,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:36,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2022-07-12 19:21:37,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,257 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:37,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 43 [2022-07-12 19:21:37,259 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 61 treesize of output 43 [2022-07-12 19:21:37,262 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 15 treesize of output 7 [2022-07-12 19:21:37,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,266 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-07-12 19:21:37,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2022-07-12 19:21:37,268 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-12 19:21:37,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,273 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:37,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-07-12 19:21:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 treesize of output 8 [2022-07-12 19:21:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,281 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-07-12 19:21:37,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 1 [2022-07-12 19:21:37,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,287 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:37,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-07-12 19:21:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 treesize of output 8 [2022-07-12 19:21:37,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:37,296 INFO L356 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-07-12 19:21:37,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 1 [2022-07-12 19:21:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 19:21:37,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946802093] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:21:37,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:21:37,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2022-07-12 19:21:37,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524383724] [2022-07-12 19:21:37,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:21:37,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 19:21:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:21:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 19:21:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1658, Unknown=6, NotChecked=0, Total=1806 [2022-07-12 19:21:37,423 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:21:38,701 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-07-12 19:21:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 19:21:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-12 19:21:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:21:38,702 INFO L225 Difference]: With dead ends: 81 [2022-07-12 19:21:38,702 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 19:21:38,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=380, Invalid=3036, Unknown=6, NotChecked=0, Total=3422 [2022-07-12 19:21:38,703 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:21:38,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 458 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 675 Invalid, 0 Unknown, 235 Unchecked, 0.4s Time] [2022-07-12 19:21:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 19:21:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-07-12 19:21:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 77 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2022-07-12 19:21:38,705 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 43 [2022-07-12 19:21:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:21:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2022-07-12 19:21:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:21:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2022-07-12 19:21:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:21:38,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:21:38,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:21:38,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 19:21:38,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 19:21:38,920 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-07-12 19:21:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:21:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1163623530, now seen corresponding path program 1 times [2022-07-12 19:21:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:21:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000176467] [2022-07-12 19:21:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:21:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:39,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:21:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000176467] [2022-07-12 19:21:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000176467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:21:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241546530] [2022-07-12 19:21:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:21:39,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:21:39,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:21:39,499 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) [2022-07-12 19:21:39,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 19:21:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:21:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-12 19:21:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:21:39,829 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:21:39,830 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 [2022-07-12 19:21:39,948 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-12 19:21:39,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-12 19:21:40,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 19:21:40,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:21:40,188 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-12 19:21:40,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-12 19:21:40,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:21:40,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:21:40,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 19:21:40,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-12 19:21:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:40,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:40,349 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 19:21:40,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-07-12 19:21:40,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-07-12 19:21:40,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30 [2022-07-12 19:21:40,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-07-12 19:21:40,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 19:21:40,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 19:21:40,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:40,533 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:40,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2022-07-12 19:21:40,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-12 19:21:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-12 19:21:40,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,736 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 19:21:40,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 50 [2022-07-12 19:21:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:21:40,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-12 19:21:40,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-12 19:21:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:40,815 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-12 19:21:40,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 39 [2022-07-12 19:21:40,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:40,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-07-12 19:21:40,919 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 [2022-07-12 19:21:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:21:40,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:21:41,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:41,853 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:41,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 143 [2022-07-12 19:21:41,864 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:41,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 909 treesize of output 899 [2022-07-12 19:21:41,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:21:41,878 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:41,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 738 treesize of output 548 [2022-07-12 19:21:41,897 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:21:41,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5072 treesize of output 4998 [2022-07-12 19:21:41,934 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 6534 treesize of output 6310 [2022-07-12 19:21:41,963 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 7115 treesize of output 6843