./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5317dae 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/array-memsafety/strreplace-alloca-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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:05:25,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:05:25,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:05:25,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:05:25,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:05:25,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:05:25,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:05:25,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:05:25,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:05:25,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:05:25,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:05:25,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:05:25,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:05:25,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:05:25,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:05:25,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:05:25,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:05:25,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:05:25,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:05:25,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:05:25,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:05:25,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:05:25,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:05:25,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:05:25,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:05:25,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:05:25,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:05:25,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:05:25,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:05:25,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:05:25,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:05:25,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:05:25,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:05:25,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:05:25,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:05:25,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:05:25,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:05:25,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:05:25,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:05:25,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:05:25,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:05:25,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-16 03:05:25,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:05:25,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:05:25,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:05:25,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:05:25,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:05:25,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:05:25,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:05:25,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:05:25,734 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:05:25,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:05:25,735 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:05:25,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:05:25,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:05:25,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:05:25,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:05:25,736 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:05:25,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:25,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:05:25,737 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:05:25,738 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:05:25,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:05:25,738 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:05:25,738 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2023-02-16 03:05:26,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:05:26,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:05:26,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:05:26,024 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:05:26,024 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:05:26,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-02-16 03:05:27,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:05:27,395 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:05:27,399 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-02-16 03:05:27,409 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138447e4f/1a39897b1ba04344a78028314fe243d8/FLAGe950666dd [2023-02-16 03:05:27,419 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138447e4f/1a39897b1ba04344a78028314fe243d8 [2023-02-16 03:05:27,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:05:27,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:05:27,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:27,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:05:27,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:05:27,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b9a2400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27, skipping insertion in model container [2023-02-16 03:05:27,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:05:27,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:05:27,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:27,701 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:05:27,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:05:27,752 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:05:27,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27 WrapperNode [2023-02-16 03:05:27,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:05:27,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:27,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:05:27,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:05:27,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,793 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-02-16 03:05:27,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:05:27,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:05:27,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:05:27,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:05:27,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:05:27,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:05:27,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:05:27,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:05:27,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (1/1) ... [2023-02-16 03:05:27,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:05:27,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:27,866 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) [2023-02-16 03:05:27,873 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 [2023-02-16 03:05:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 03:05:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 03:05:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 03:05:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 03:05:27,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:05:27,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:05:28,026 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:05:28,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:05:28,161 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:05:28,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:05:28,166 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 03:05:28,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:28 BoogieIcfgContainer [2023-02-16 03:05:28,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:05:28,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:05:28,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:05:28,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:05:28,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:05:27" (1/3) ... [2023-02-16 03:05:28,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fa51cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:28, skipping insertion in model container [2023-02-16 03:05:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:05:27" (2/3) ... [2023-02-16 03:05:28,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fa51cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:05:28, skipping insertion in model container [2023-02-16 03:05:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:05:28" (3/3) ... [2023-02-16 03:05:28,174 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2023-02-16 03:05:28,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:05:28,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-02-16 03:05:28,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:05:28,229 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b4e53f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:05:28,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-02-16 03:05:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:05:28,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:28,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:05:28,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2023-02-16 03:05:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731835641] [2023-02-16 03:05:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:28,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:28,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731835641] [2023-02-16 03:05:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731835641] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:28,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:28,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:05:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746861440] [2023-02-16 03:05:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:28,471 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:28,507 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-02-16 03:05:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-16 03:05:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:28,543 INFO L225 Difference]: With dead ends: 58 [2023-02-16 03:05:28,543 INFO L226 Difference]: Without dead ends: 54 [2023-02-16 03:05:28,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:28,547 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:28,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-16 03:05:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2023-02-16 03:05:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-02-16 03:05:28,585 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2023-02-16 03:05:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:28,585 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-02-16 03:05:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-02-16 03:05:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:05:28,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:28,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:05:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:05:28,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2023-02-16 03:05:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:28,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833909145] [2023-02-16 03:05:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833909145] [2023-02-16 03:05:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833909145] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:28,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:28,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 03:05:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752998050] [2023-02-16 03:05:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 03:05:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 03:05:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 03:05:28,740 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:28,802 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-02-16 03:05:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 03:05:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-16 03:05:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:28,806 INFO L225 Difference]: With dead ends: 31 [2023-02-16 03:05:28,806 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 03:05:28,810 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 [2023-02-16 03:05:28,811 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:28,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 03:05:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-16 03:05:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-02-16 03:05:28,833 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2023-02-16 03:05:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:28,834 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-02-16 03:05:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-02-16 03:05:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:05:28,836 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:28,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:05:28,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:05:28,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:28,838 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2023-02-16 03:05:28,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:28,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683634176] [2023-02-16 03:05:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:29,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683634176] [2023-02-16 03:05:29,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683634176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:29,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:29,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:05:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131067981] [2023-02-16 03:05:29,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:29,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:29,139 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:29,189 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-02-16 03:05:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-16 03:05:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:29,190 INFO L225 Difference]: With dead ends: 50 [2023-02-16 03:05:29,190 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 03:05:29,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:29,191 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:29,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 03:05:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2023-02-16 03:05:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-16 03:05:29,194 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2023-02-16 03:05:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:29,194 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-16 03:05:29,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-16 03:05:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:05:29,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:29,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:05:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:05:29,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2023-02-16 03:05:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942635234] [2023-02-16 03:05:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:29,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942635234] [2023-02-16 03:05:29,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942635234] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:29,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:29,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:05:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463206988] [2023-02-16 03:05:29,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:29,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:05:29,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:05:29,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:05:29,302 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:29,358 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-16 03:05:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:05:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-16 03:05:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:29,366 INFO L225 Difference]: With dead ends: 56 [2023-02-16 03:05:29,366 INFO L226 Difference]: Without dead ends: 56 [2023-02-16 03:05:29,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:05:29,367 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:29,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-16 03:05:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2023-02-16 03:05:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-16 03:05:29,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2023-02-16 03:05:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:29,371 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-16 03:05:29,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-16 03:05:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-16 03:05:29,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:29,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-16 03:05:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:05:29,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2023-02-16 03:05:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265177352] [2023-02-16 03:05:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265177352] [2023-02-16 03:05:29,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265177352] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:29,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:05:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68287737] [2023-02-16 03:05:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:29,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:05:29,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:05:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:05:29,453 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:29,472 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-16 03:05:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:05:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-02-16 03:05:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:29,473 INFO L225 Difference]: With dead ends: 33 [2023-02-16 03:05:29,473 INFO L226 Difference]: Without dead ends: 33 [2023-02-16 03:05:29,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:05:29,474 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:29,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-16 03:05:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-02-16 03:05:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-16 03:05:29,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-16 03:05:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:29,477 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-16 03:05:29,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-16 03:05:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:05:29,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:29,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:29,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:05:29,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2023-02-16 03:05:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:29,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291523818] [2023-02-16 03:05:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:29,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291523818] [2023-02-16 03:05:29,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291523818] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:29,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:29,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:05:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292735915] [2023-02-16 03:05:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:29,520 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:29,543 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-02-16 03:05:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:29,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-16 03:05:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:29,544 INFO L225 Difference]: With dead ends: 29 [2023-02-16 03:05:29,544 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 03:05:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:05:29,545 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:29,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 03:05:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-16 03:05:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-16 03:05:29,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2023-02-16 03:05:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:29,548 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-16 03:05:29,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-16 03:05:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:05:29,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:29,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-16 03:05:29,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2023-02-16 03:05:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762341812] [2023-02-16 03:05:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:29,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762341812] [2023-02-16 03:05:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762341812] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:29,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:29,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 03:05:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269357168] [2023-02-16 03:05:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:29,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 03:05:29,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 03:05:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 03:05:29,771 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:29,844 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-02-16 03:05:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:05:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-02-16 03:05:29,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:29,847 INFO L225 Difference]: With dead ends: 41 [2023-02-16 03:05:29,847 INFO L226 Difference]: Without dead ends: 41 [2023-02-16 03:05:29,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:05:29,849 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:29,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-16 03:05:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-02-16 03:05:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 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) [2023-02-16 03:05:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-02-16 03:05:29,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 8 [2023-02-16 03:05:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:29,855 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-02-16 03:05:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-02-16 03:05:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:05:29,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:29,856 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:29,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-16 03:05:29,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:29,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2023-02-16 03:05:29,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:29,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422021531] [2023-02-16 03:05:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:29,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:30,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:30,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422021531] [2023-02-16 03:05:30,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422021531] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:30,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564003912] [2023-02-16 03:05:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:30,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:30,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:30,034 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) [2023-02-16 03:05:30,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:05:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 03:05:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:30,140 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2023-02-16 03:05:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:30,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:30,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564003912] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:30,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:30,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-02-16 03:05:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982570658] [2023-02-16 03:05:30,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:30,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:30,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:30,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:30,485 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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) [2023-02-16 03:05:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:30,702 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-02-16 03:05:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:05:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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 10 [2023-02-16 03:05:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:30,705 INFO L225 Difference]: With dead ends: 78 [2023-02-16 03:05:30,705 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 03:05:30,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:05:30,711 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:30,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 122 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 03:05:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2023-02-16 03:05:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-02-16 03:05:30,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2023-02-16 03:05:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:30,723 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-02-16 03:05:30,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 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) [2023-02-16 03:05:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-02-16 03:05:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 03:05:30,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:30,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:30,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:30,928 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 [2023-02-16 03:05:30,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2023-02-16 03:05:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:30,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884220811] [2023-02-16 03:05:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:30,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884220811] [2023-02-16 03:05:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884220811] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:30,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:30,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 03:05:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125056962] [2023-02-16 03:05:30,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:05:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:05:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:31,002 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-02-16 03:05:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:31,020 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-02-16 03:05:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:05:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 [2023-02-16 03:05:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:31,021 INFO L225 Difference]: With dead ends: 30 [2023-02-16 03:05:31,021 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 03:05:31,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:05:31,022 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:31,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 03:05:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-16 03:05:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 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) [2023-02-16 03:05:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-16 03:05:31,029 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2023-02-16 03:05:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:31,029 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-16 03:05:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-02-16 03:05:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-16 03:05:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:05:31,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:31,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-16 03:05:31,030 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2023-02-16 03:05:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916552133] [2023-02-16 03:05:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:31,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:31,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916552133] [2023-02-16 03:05:31,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916552133] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:31,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:31,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-16 03:05:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984283222] [2023-02-16 03:05:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:31,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:05:31,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:05:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-16 03:05:31,169 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:31,220 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-02-16 03:05:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 03:05:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-02-16 03:05:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:31,221 INFO L225 Difference]: With dead ends: 31 [2023-02-16 03:05:31,221 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 03:05:31,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-16 03:05:31,222 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:31,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 03:05:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-16 03:05:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 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) [2023-02-16 03:05:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-16 03:05:31,226 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2023-02-16 03:05:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:31,226 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-16 03:05:31,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-16 03:05:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 03:05:31,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:31,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:31,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-16 03:05:31,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2023-02-16 03:05:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:31,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178985141] [2023-02-16 03:05:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178985141] [2023-02-16 03:05:31,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178985141] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:05:31,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:05:31,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 03:05:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666300910] [2023-02-16 03:05:31,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:05:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 03:05:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 03:05:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-16 03:05:31,402 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:31,490 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-16 03:05:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 03:05:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-02-16 03:05:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:31,492 INFO L225 Difference]: With dead ends: 33 [2023-02-16 03:05:31,492 INFO L226 Difference]: Without dead ends: 29 [2023-02-16 03:05:31,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:05:31,493 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:31,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 72 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-16 03:05:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-02-16 03:05:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 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) [2023-02-16 03:05:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-16 03:05:31,496 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2023-02-16 03:05:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:31,496 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-16 03:05:31,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-16 03:05:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-16 03:05:31,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:31,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:31,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-16 03:05:31,497 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2023-02-16 03:05:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930698909] [2023-02-16 03:05:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930698909] [2023-02-16 03:05:31,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930698909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:31,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250152901] [2023-02-16 03:05:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:31,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:31,713 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) [2023-02-16 03:05:31,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:05:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 03:05:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:31,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:31,902 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-16 03:05:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:31,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250152901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:31,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:31,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-16 03:05:31,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511304085] [2023-02-16 03:05:31,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:05:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:05:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:05:31,923 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:32,013 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-02-16 03:05:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:05:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 17 [2023-02-16 03:05:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:32,014 INFO L225 Difference]: With dead ends: 36 [2023-02-16 03:05:32,014 INFO L226 Difference]: Without dead ends: 36 [2023-02-16 03:05:32,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-02-16 03:05:32,015 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 133 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:32,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 49 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 03:05:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-16 03:05:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2023-02-16 03:05:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-16 03:05:32,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2023-02-16 03:05:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:32,018 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-16 03:05:32,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-16 03:05:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 03:05:32,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:32,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:32,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:32,233 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,SelfDestructingSolverStorable11 [2023-02-16 03:05:32,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2023-02-16 03:05:32,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:32,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760061089] [2023-02-16 03:05:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:32,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760061089] [2023-02-16 03:05:32,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760061089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660641828] [2023-02-16 03:05:32,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:05:32,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:32,510 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) [2023-02-16 03:05:32,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:05:32,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:05:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:32,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:05:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:32,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:05:32,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:05:32,760 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2023-02-16 03:05:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:32,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:33,070 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:05:33,076 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:33,080 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:05:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660641828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:33,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:33,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-02-16 03:05:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433787255] [2023-02-16 03:05:33,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 03:05:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 03:05:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:05:33,111 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:35,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:05:36,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:05:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:37,243 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2023-02-16 03:05:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 03:05:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 22 [2023-02-16 03:05:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:37,244 INFO L225 Difference]: With dead ends: 87 [2023-02-16 03:05:37,244 INFO L226 Difference]: Without dead ends: 76 [2023-02-16 03:05:37,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=482, Invalid=2274, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 03:05:37,245 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 358 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:37,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 173 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 277 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-16 03:05:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-16 03:05:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2023-02-16 03:05:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-02-16 03:05:37,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2023-02-16 03:05:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:37,247 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-02-16 03:05:37,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-02-16 03:05:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 03:05:37,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:37,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:37,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:37,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:37,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2023-02-16 03:05:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:37,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099432224] [2023-02-16 03:05:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:37,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099432224] [2023-02-16 03:05:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099432224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114874382] [2023-02-16 03:05:37,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:05:37,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:37,701 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) [2023-02-16 03:05:37,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:05:37,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 03:05:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 03:05:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:37,798 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:37,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-16 03:05:39,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:05:39,187 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 22 [2023-02-16 03:05:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:39,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:39,552 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 11 [2023-02-16 03:05:39,555 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-16 03:05:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114874382] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:39,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:39,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2023-02-16 03:05:39,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214201567] [2023-02-16 03:05:39,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:05:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:05:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1003, Unknown=1, NotChecked=0, Total=1122 [2023-02-16 03:05:39,820 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 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) [2023-02-16 03:05:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:42,654 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-02-16 03:05:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 03:05:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 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) Word has length 31 [2023-02-16 03:05:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:42,655 INFO L225 Difference]: With dead ends: 66 [2023-02-16 03:05:42,655 INFO L226 Difference]: Without dead ends: 45 [2023-02-16 03:05:42,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=346, Invalid=1909, Unknown=1, NotChecked=0, Total=2256 [2023-02-16 03:05:42,656 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 165 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:42,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 271 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:05:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-16 03:05:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-02-16 03:05:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-02-16 03:05:42,658 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2023-02-16 03:05:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:42,658 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-02-16 03:05:42,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 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) [2023-02-16 03:05:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-02-16 03:05:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 03:05:42,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:42,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:42,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:42,864 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2023-02-16 03:05:42,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:42,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681831147] [2023-02-16 03:05:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681831147] [2023-02-16 03:05:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681831147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295147571] [2023-02-16 03:05:43,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:05:43,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:43,174 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) [2023-02-16 03:05:43,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:05:43,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:05:43,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:43,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:05:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:43,243 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:43,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:43,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295147571] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:43,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:43,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-02-16 03:05:43,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270927772] [2023-02-16 03:05:43,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:43,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 03:05:43,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 03:05:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-02-16 03:05:43,658 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 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) [2023-02-16 03:05:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:43,925 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-16 03:05:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 03:05:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 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 35 [2023-02-16 03:05:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:43,926 INFO L225 Difference]: With dead ends: 55 [2023-02-16 03:05:43,926 INFO L226 Difference]: Without dead ends: 55 [2023-02-16 03:05:43,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 03:05:43,927 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:43,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 178 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-16 03:05:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-02-16 03:05:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-02-16 03:05:43,929 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2023-02-16 03:05:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:43,929 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-02-16 03:05:43,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 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) [2023-02-16 03:05:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-02-16 03:05:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-16 03:05:43,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:43,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:43,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:44,137 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,SelfDestructingSolverStorable14 [2023-02-16 03:05:44,137 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2023-02-16 03:05:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:44,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260662956] [2023-02-16 03:05:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:44,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:44,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260662956] [2023-02-16 03:05:44,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260662956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:44,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25235467] [2023-02-16 03:05:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:05:44,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:44,434 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) [2023-02-16 03:05:44,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:05:44,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-16 03:05:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 03:05:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:44,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:05:44,722 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:44,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:44,790 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:05:44,792 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:05:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:44,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25235467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:44,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:44,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2023-02-16 03:05:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849977453] [2023-02-16 03:05:44,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:44,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 03:05:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 03:05:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:05:44,886 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2023-02-16 03:05:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:45,240 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2023-02-16 03:05:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 03:05:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) Word has length 40 [2023-02-16 03:05:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:45,241 INFO L225 Difference]: With dead ends: 90 [2023-02-16 03:05:45,241 INFO L226 Difference]: Without dead ends: 56 [2023-02-16 03:05:45,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 03:05:45,242 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:45,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 247 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-16 03:05:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2023-02-16 03:05:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-02-16 03:05:45,243 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2023-02-16 03:05:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:45,243 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-02-16 03:05:45,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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) [2023-02-16 03:05:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-02-16 03:05:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:05:45,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:45,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:45,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 03:05:45,453 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,SelfDestructingSolverStorable15 [2023-02-16 03:05:45,453 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2023-02-16 03:05:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:45,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873635130] [2023-02-16 03:05:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873635130] [2023-02-16 03:05:45,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873635130] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445472354] [2023-02-16 03:05:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 03:05:45,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:45,726 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) [2023-02-16 03:05:45,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:05:45,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-16 03:05:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:05:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-16 03:05:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:45,794 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:45,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:46,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445472354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:46,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:46,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-02-16 03:05:46,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184109688] [2023-02-16 03:05:46,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 03:05:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 03:05:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 03:05:46,244 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:05:46,453 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-02-16 03:05:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 03:05:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 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 44 [2023-02-16 03:05:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:05:46,454 INFO L225 Difference]: With dead ends: 66 [2023-02-16 03:05:46,454 INFO L226 Difference]: Without dead ends: 66 [2023-02-16 03:05:46,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1582, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 03:05:46,455 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 522 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:05:46,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 176 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:05:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-16 03:05:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-16 03:05:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 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) [2023-02-16 03:05:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-02-16 03:05:46,457 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2023-02-16 03:05:46,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:05:46,457 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-02-16 03:05:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-02-16 03:05:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-16 03:05:46,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:05:46,458 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:05:46,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:05:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:46,663 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:05:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:05:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2023-02-16 03:05:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:05:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530736999] [2023-02-16 03:05:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:05:46,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:05:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:05:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530736999] [2023-02-16 03:05:47,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530736999] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:05:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302688216] [2023-02-16 03:05:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:05:47,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:05:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:05:47,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:05:47,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:05:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:05:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 03:05:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:05:47,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:05:47,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:05:47,527 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2023-02-16 03:05:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:47,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:05:48,042 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:05:48,052 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:05:48,055 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:05:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:05:48,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302688216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:05:48,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:05:48,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-02-16 03:05:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634964146] [2023-02-16 03:05:48,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:05:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 03:05:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:05:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 03:05:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 03:05:48,132 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:05:50,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:05:52,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:05:55,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:05:58,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:02,953 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2023-02-16 03:06:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-16 03:06:02,953 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-16 03:06:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:02,954 INFO L225 Difference]: With dead ends: 185 [2023-02-16 03:06:02,954 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 03:06:02,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1085, Invalid=6055, Unknown=0, NotChecked=0, Total=7140 [2023-02-16 03:06:02,959 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1247 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:02,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 595 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 5 Unknown, 0 Unchecked, 9.4s Time] [2023-02-16 03:06:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 03:06:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 71. [2023-02-16 03:06:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 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) [2023-02-16 03:06:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2023-02-16 03:06:02,973 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 49 [2023-02-16 03:06:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:02,973 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2023-02-16 03:06:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2023-02-16 03:06:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 03:06:02,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:02,976 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:02,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-16 03:06:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 03:06:03,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:06:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 8 times [2023-02-16 03:06:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:03,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803410713] [2023-02-16 03:06:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:03,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:03,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803410713] [2023-02-16 03:06:03,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803410713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154145713] [2023-02-16 03:06:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:06:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:03,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:06:03,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:06:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 03:06:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:03,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:06:04,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:06:04,178 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2023-02-16 03:06:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:04,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:04,871 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:06:04,874 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:06:04,876 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:06:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:04,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154145713] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:04,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:04,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2023-02-16 03:06:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829424471] [2023-02-16 03:06:04,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:04,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 03:06:04,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:04,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 03:06:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 03:06:04,946 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:07,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:10,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:17,632 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2023-02-16 03:06:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-16 03:06:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 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 58 [2023-02-16 03:06:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:17,633 INFO L225 Difference]: With dead ends: 221 [2023-02-16 03:06:17,633 INFO L226 Difference]: Without dead ends: 144 [2023-02-16 03:06:17,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1305, Invalid=7625, Unknown=0, NotChecked=0, Total=8930 [2023-02-16 03:06:17,635 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1370 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 81 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:17,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 857 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1302 Invalid, 8 Unknown, 0 Unchecked, 8.1s Time] [2023-02-16 03:06:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-16 03:06:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 82. [2023-02-16 03:06:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-02-16 03:06:17,638 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2023-02-16 03:06:17,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:17,638 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-02-16 03:06:17,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-02-16 03:06:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 03:06:17,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:17,639 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:17,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:17,844 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:06:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -94420198, now seen corresponding path program 9 times [2023-02-16 03:06:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305672377] [2023-02-16 03:06:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305672377] [2023-02-16 03:06:18,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305672377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184690336] [2023-02-16 03:06:18,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:06:18,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:18,322 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:18,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:06:18,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 03:06:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-16 03:06:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:18,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:06:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:18,887 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:06:18,888 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:06:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184690336] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:19,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2023-02-16 03:06:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005079197] [2023-02-16 03:06:19,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 03:06:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 03:06:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 03:06:19,005 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:19,864 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-02-16 03:06:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 03:06:19,864 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 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 67 [2023-02-16 03:06:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:19,865 INFO L225 Difference]: With dead ends: 162 [2023-02-16 03:06:19,865 INFO L226 Difference]: Without dead ends: 89 [2023-02-16 03:06:19,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=3067, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 03:06:19,866 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 443 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:19,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 670 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:06:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-16 03:06:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-02-16 03:06:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-02-16 03:06:19,868 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 67 [2023-02-16 03:06:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:19,868 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-02-16 03:06:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-02-16 03:06:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-16 03:06:19,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:19,869 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:19,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:20,070 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:06:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -810678089, now seen corresponding path program 10 times [2023-02-16 03:06:20,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:20,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343111941] [2023-02-16 03:06:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:20,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343111941] [2023-02-16 03:06:20,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343111941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537583077] [2023-02-16 03:06:20,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:06:20,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:20,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:20,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:20,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:06:20,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:06:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:20,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 03:06:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:20,571 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:06:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:20,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:21,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537583077] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:21,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:21,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2023-02-16 03:06:21,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090036114] [2023-02-16 03:06:21,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:06:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:06:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:06:21,306 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:21,840 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-02-16 03:06:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 03:06:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 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 71 [2023-02-16 03:06:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:21,842 INFO L225 Difference]: With dead ends: 99 [2023-02-16 03:06:21,842 INFO L226 Difference]: Without dead ends: 99 [2023-02-16 03:06:21,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 03:06:21,844 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 625 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:21,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 539 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:06:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-16 03:06:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2023-02-16 03:06:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-02-16 03:06:21,849 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 71 [2023-02-16 03:06:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:21,849 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-02-16 03:06:21,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.74468085106383) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-02-16 03:06:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-16 03:06:21,852 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:21,852 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:21,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:06:22,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-16 03:06:22,057 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:06:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1424467667, now seen corresponding path program 11 times [2023-02-16 03:06:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:22,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041696420] [2023-02-16 03:06:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:22,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041696420] [2023-02-16 03:06:22,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041696420] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:22,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016893615] [2023-02-16 03:06:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:06:22,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:22,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:22,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:06:22,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-16 03:06:22,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-16 03:06:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:22,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:06:23,073 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:06:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:23,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:23,177 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:06:23,179 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:06:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:23,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016893615] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:23,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:23,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2023-02-16 03:06:23,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373264094] [2023-02-16 03:06:23,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:23,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 03:06:23,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 03:06:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 03:06:23,309 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:06:24,395 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2023-02-16 03:06:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-16 03:06:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 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 76 [2023-02-16 03:06:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:06:24,396 INFO L225 Difference]: With dead ends: 186 [2023-02-16 03:06:24,396 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 03:06:24,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=3646, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 03:06:24,398 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 520 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:06:24,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 986 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:06:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 03:06:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2023-02-16 03:06:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 96 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-16 03:06:24,400 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 76 [2023-02-16 03:06:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:06:24,400 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-16 03:06:24,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-16 03:06:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-16 03:06:24,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:06:24,401 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:06:24,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-16 03:06:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-16 03:06:24,602 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:06:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:06:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1117885488, now seen corresponding path program 12 times [2023-02-16 03:06:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:06:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545935948] [2023-02-16 03:06:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:06:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:06:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:06:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:06:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545935948] [2023-02-16 03:06:25,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545935948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:06:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531592854] [2023-02-16 03:06:25,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 03:06:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:06:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:06:25,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:06:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:06:25,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-16 03:06:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:06:25,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-16 03:06:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:06:25,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:06:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 03:06:39,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-02-16 03:06:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:06:40,565 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 11 [2023-02-16 03:06:40,568 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-16 03:06:40,571 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:06:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:06:40,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531592854] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:06:40,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:06:40,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 23] total 56 [2023-02-16 03:06:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802399776] [2023-02-16 03:06:40,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:06:40,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-16 03:06:40,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:06:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-16 03:06:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2743, Unknown=5, NotChecked=0, Total=3192 [2023-02-16 03:06:40,757 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:06:43,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:45,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:48,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:50,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:06:59,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:01,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:07,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:10,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:07:10,627 INFO L93 Difference]: Finished difference Result 196 states and 220 transitions. [2023-02-16 03:07:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-16 03:07:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 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 80 [2023-02-16 03:07:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:07:10,629 INFO L225 Difference]: With dead ends: 196 [2023-02-16 03:07:10,629 INFO L226 Difference]: Without dead ends: 196 [2023-02-16 03:07:10,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=1801, Invalid=6381, Unknown=8, NotChecked=0, Total=8190 [2023-02-16 03:07:10,634 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1607 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 54 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:07:10,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 696 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1031 Invalid, 9 Unknown, 0 Unchecked, 17.3s Time] [2023-02-16 03:07:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-02-16 03:07:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 111. [2023-02-16 03:07:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 110 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2023-02-16 03:07:10,639 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 80 [2023-02-16 03:07:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:07:10,639 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2023-02-16 03:07:10,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.75) internal successors, (210), 57 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2023-02-16 03:07:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-16 03:07:10,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:07:10,640 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:07:10,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:07:10,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-16 03:07:10,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:07:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:07:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash -615109968, now seen corresponding path program 13 times [2023-02-16 03:07:10,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:07:10,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299358975] [2023-02-16 03:07:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:10,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:07:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:11,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:07:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299358975] [2023-02-16 03:07:11,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299358975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:07:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739719627] [2023-02-16 03:07:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:07:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:11,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:07:11,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:07:11,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:07:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-16 03:07:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:07:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:07:12,933 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-16 03:07:12,933 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2023-02-16 03:07:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:07:12,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:07:13,522 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:07:13,523 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:07:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 75 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 03:07:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739719627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:07:13,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:07:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 60 [2023-02-16 03:07:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871085175] [2023-02-16 03:07:13,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:07:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-16 03:07:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:07:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-16 03:07:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3390, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 03:07:13,724 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:07:17,420 INFO L93 Difference]: Finished difference Result 217 states and 241 transitions. [2023-02-16 03:07:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-16 03:07:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 0 states have call successors, (0), 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 90 [2023-02-16 03:07:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:07:17,421 INFO L225 Difference]: With dead ends: 217 [2023-02-16 03:07:17,421 INFO L226 Difference]: Without dead ends: 118 [2023-02-16 03:07:17,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=646, Invalid=8666, Unknown=0, NotChecked=0, Total=9312 [2023-02-16 03:07:17,422 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 689 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:07:17,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1636 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-16 03:07:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-16 03:07:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2023-02-16 03:07:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2023-02-16 03:07:17,424 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 90 [2023-02-16 03:07:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:07:17,424 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2023-02-16 03:07:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2023-02-16 03:07:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-16 03:07:17,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:07:17,425 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:07:17,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 03:07:17,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:17,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:07:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:07:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1372691341, now seen corresponding path program 14 times [2023-02-16 03:07:17,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:07:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766528098] [2023-02-16 03:07:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:07:17,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:07:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:07:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:07:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766528098] [2023-02-16 03:07:18,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766528098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:07:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619308213] [2023-02-16 03:07:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:07:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:07:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:07:18,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:07:18,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:07:18,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:07:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:07:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-16 03:07:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:07:18,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:07:19,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:07:19,665 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2023-02-16 03:07:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:07:20,784 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:07:20,788 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:07:20,791 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:07:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:07:21,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619308213] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:07:21,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:07:21,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 66 [2023-02-16 03:07:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370079519] [2023-02-16 03:07:21,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:07:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-16 03:07:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:07:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-16 03:07:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3965, Unknown=0, NotChecked=0, Total=4290 [2023-02-16 03:07:21,020 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:07:24,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:26,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:28,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:31,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:34,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:37,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:39,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:43,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:46,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:49,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:53,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:07:54,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:08:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:00,014 INFO L93 Difference]: Finished difference Result 427 states and 480 transitions. [2023-02-16 03:08:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-02-16 03:08:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 0 states have call successors, (0), 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 94 [2023-02-16 03:08:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:00,016 INFO L225 Difference]: With dead ends: 427 [2023-02-16 03:08:00,016 INFO L226 Difference]: Without dead ends: 271 [2023-02-16 03:08:00,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 139 SyntacticMatches, 10 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5365 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3633, Invalid=21173, Unknown=0, NotChecked=0, Total=24806 [2023-02-16 03:08:00,018 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3234 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 2848 mSolverCounterSat, 218 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3234 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2848 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:00,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3234 Valid, 2074 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2848 Invalid, 17 Unknown, 0 Unchecked, 28.9s Time] [2023-02-16 03:08:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-02-16 03:08:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 126. [2023-02-16 03:08:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.104) internal successors, (138), 125 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2023-02-16 03:08:00,020 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 94 [2023-02-16 03:08:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:00,020 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2023-02-16 03:08:00,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.606060606060606) internal successors, (238), 66 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2023-02-16 03:08:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-16 03:08:00,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:00,027 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:00,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 03:08:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:00,233 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1263467378, now seen corresponding path program 15 times [2023-02-16 03:08:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:00,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026702907] [2023-02-16 03:08:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026702907] [2023-02-16 03:08:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026702907] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88107287] [2023-02-16 03:08:00,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:08:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:00,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:01,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:08:01,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-16 03:08:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-16 03:08:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:01,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:08:01,734 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:08:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:01,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:01,879 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:08:01,880 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:08:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:02,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88107287] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:02,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:02,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2023-02-16 03:08:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657114113] [2023-02-16 03:08:02,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:02,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-16 03:08:02,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-16 03:08:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 03:08:02,051 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:03,862 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2023-02-16 03:08:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-16 03:08:03,862 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 0 states have call successors, (0), 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 103 [2023-02-16 03:08:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:03,863 INFO L225 Difference]: With dead ends: 258 [2023-02-16 03:08:03,863 INFO L226 Difference]: Without dead ends: 133 [2023-02-16 03:08:03,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2023-02-16 03:08:03,864 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 467 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:03,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 1663 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 03:08:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-16 03:08:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2023-02-16 03:08:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2023-02-16 03:08:03,871 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2023-02-16 03:08:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:03,871 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2023-02-16 03:08:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4893617021276597) internal successors, (164), 47 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2023-02-16 03:08:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-16 03:08:03,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:03,877 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:03,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 03:08:04,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-16 03:08:04,083 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1364328533, now seen corresponding path program 16 times [2023-02-16 03:08:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287322685] [2023-02-16 03:08:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:04,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287322685] [2023-02-16 03:08:04,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287322685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:04,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109984453] [2023-02-16 03:08:04,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:08:04,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:04,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:04,893 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:04,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 03:08:05,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:08:05,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-16 03:08:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:05,075 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:08:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:05,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:06,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109984453] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:06,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:06,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 67 [2023-02-16 03:08:06,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561185243] [2023-02-16 03:08:06,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:06,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-16 03:08:06,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:06,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-16 03:08:06,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=3966, Unknown=0, NotChecked=0, Total=4556 [2023-02-16 03:08:06,177 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:07,002 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2023-02-16 03:08:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 03:08:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 0 states have call successors, (0), 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 107 [2023-02-16 03:08:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:07,003 INFO L225 Difference]: With dead ends: 143 [2023-02-16 03:08:07,003 INFO L226 Difference]: Without dead ends: 143 [2023-02-16 03:08:07,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1320, Invalid=5486, Unknown=0, NotChecked=0, Total=6806 [2023-02-16 03:08:07,006 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1030 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:07,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1073 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:08:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-16 03:08:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2023-02-16 03:08:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 136 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2023-02-16 03:08:07,010 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 107 [2023-02-16 03:08:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:07,011 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2023-02-16 03:08:07,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 68 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2023-02-16 03:08:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-16 03:08:07,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:07,012 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:07,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-16 03:08:07,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-16 03:08:07,217 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1140811079, now seen corresponding path program 17 times [2023-02-16 03:08:07,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:07,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676672632] [2023-02-16 03:08:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676672632] [2023-02-16 03:08:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676672632] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446930532] [2023-02-16 03:08:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 03:08:08,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:08,050 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:08,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 03:08:08,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-16 03:08:08,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-16 03:08:08,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:08,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:08:08,590 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:08:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:08,710 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:08:08,712 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:08:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:08,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446930532] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:08,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:08,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2023-02-16 03:08:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737869580] [2023-02-16 03:08:08,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:08,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-16 03:08:08,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-16 03:08:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 03:08:08,875 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:10,790 INFO L93 Difference]: Finished difference Result 282 states and 314 transitions. [2023-02-16 03:08:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-16 03:08:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 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 112 [2023-02-16 03:08:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:10,791 INFO L225 Difference]: With dead ends: 282 [2023-02-16 03:08:10,791 INFO L226 Difference]: Without dead ends: 144 [2023-02-16 03:08:10,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2023-02-16 03:08:10,805 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 761 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:10,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 1798 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 03:08:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-16 03:08:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2023-02-16 03:08:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2023-02-16 03:08:10,816 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 112 [2023-02-16 03:08:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:10,816 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2023-02-16 03:08:10,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2023-02-16 03:08:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-16 03:08:10,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:10,817 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:10,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 03:08:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-16 03:08:11,024 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash -339750852, now seen corresponding path program 18 times [2023-02-16 03:08:11,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:11,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531967807] [2023-02-16 03:08:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:11,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:11,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531967807] [2023-02-16 03:08:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531967807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943706401] [2023-02-16 03:08:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 03:08:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:11,909 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:11,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 03:08:12,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-16 03:08:12,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-16 03:08:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:12,243 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:08:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:13,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943706401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:14,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:14,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2023-02-16 03:08:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914529746] [2023-02-16 03:08:14,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:14,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-02-16 03:08:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-02-16 03:08:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=6124, Unknown=0, NotChecked=0, Total=7140 [2023-02-16 03:08:14,199 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:14,974 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2023-02-16 03:08:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-16 03:08:14,974 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-02-16 03:08:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:14,977 INFO L225 Difference]: With dead ends: 154 [2023-02-16 03:08:14,977 INFO L226 Difference]: Without dead ends: 154 [2023-02-16 03:08:14,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1962, Invalid=8138, Unknown=0, NotChecked=0, Total=10100 [2023-02-16 03:08:14,978 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 781 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 849 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:08:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-16 03:08:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-02-16 03:08:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 147 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2023-02-16 03:08:14,984 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 116 [2023-02-16 03:08:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:14,984 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2023-02-16 03:08:14,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.071428571428571) internal successors, (342), 85 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2023-02-16 03:08:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-16 03:08:14,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:14,985 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:14,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-16 03:08:15,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-16 03:08:15,191 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -385909560, now seen corresponding path program 19 times [2023-02-16 03:08:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:15,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112904851] [2023-02-16 03:08:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:15,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112904851] [2023-02-16 03:08:16,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112904851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179534473] [2023-02-16 03:08:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 03:08:16,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:16,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:16,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:16,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 03:08:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-16 03:08:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:16,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:08:16,900 INFO L350 Elim1Store]: Elim1 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 [2023-02-16 03:08:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:16,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:17,020 INFO L350 Elim1Store]: Elim1 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 13 [2023-02-16 03:08:17,022 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:08:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:17,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179534473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:17,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:17,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2023-02-16 03:08:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328223951] [2023-02-16 03:08:17,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-16 03:08:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-16 03:08:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 03:08:17,159 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:18,934 INFO L93 Difference]: Finished difference Result 306 states and 341 transitions. [2023-02-16 03:08:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-16 03:08:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 0 states have call successors, (0), 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 121 [2023-02-16 03:08:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:18,935 INFO L225 Difference]: With dead ends: 306 [2023-02-16 03:08:18,935 INFO L226 Difference]: Without dead ends: 155 [2023-02-16 03:08:18,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=571, Invalid=8171, Unknown=0, NotChecked=0, Total=8742 [2023-02-16 03:08:18,936 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 730 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 3396 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:18,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2358 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3396 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-16 03:08:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-16 03:08:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2023-02-16 03:08:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.099337748344371) internal successors, (166), 151 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2023-02-16 03:08:18,939 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 121 [2023-02-16 03:08:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:18,939 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2023-02-16 03:08:18,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.5849056603773586) internal successors, (190), 53 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2023-02-16 03:08:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-16 03:08:18,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:18,940 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:18,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 03:08:19,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:19,146 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:19,146 INFO L85 PathProgramCache]: Analyzing trace with hash 908118693, now seen corresponding path program 20 times [2023-02-16 03:08:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:19,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178729270] [2023-02-16 03:08:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:19,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 231 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:19,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178729270] [2023-02-16 03:08:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178729270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340788969] [2023-02-16 03:08:19,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:08:19,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:19,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:19,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:19,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 03:08:20,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:08:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-16 03:08:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:20,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:08:21,159 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-02-16 03:08:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:21,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340788969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:08:21,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:08:21,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 63 [2023-02-16 03:08:21,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195387879] [2023-02-16 03:08:21,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:08:21,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-16 03:08:21,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:08:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-16 03:08:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3541, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 03:08:21,467 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:08:22,405 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2023-02-16 03:08:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:08:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 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 125 [2023-02-16 03:08:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:08:22,406 INFO L225 Difference]: With dead ends: 165 [2023-02-16 03:08:22,406 INFO L226 Difference]: Without dead ends: 165 [2023-02-16 03:08:22,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 202 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1200, Invalid=5280, Unknown=0, NotChecked=0, Total=6480 [2023-02-16 03:08:22,407 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1151 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:08:22,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1316 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:08:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-16 03:08:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-16 03:08:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1012658227848102) internal successors, (174), 158 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 174 transitions. [2023-02-16 03:08:22,410 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 174 transitions. Word has length 125 [2023-02-16 03:08:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:08:22,410 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 174 transitions. [2023-02-16 03:08:22,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.031746031746032) internal successors, (254), 64 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:08:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 174 transitions. [2023-02-16 03:08:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-16 03:08:22,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:08:22,411 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:08:22,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 03:08:22,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:22,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-16 03:08:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:08:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1767349247, now seen corresponding path program 21 times [2023-02-16 03:08:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:08:22,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692705760] [2023-02-16 03:08:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:08:22,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:08:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:08:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:08:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:08:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692705760] [2023-02-16 03:08:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692705760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:08:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79673977] [2023-02-16 03:08:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:08:23,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:08:23,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:08:23,537 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 03:08:23,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 03:08:23,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-16 03:08:23,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:08:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-16 03:08:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:08:24,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-16 03:09:12,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-16 03:09:12,409 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2023-02-16 03:09:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:09:12,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:09:14,645 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 11 [2023-02-16 03:09:14,656 INFO L350 Elim1Store]: Elim1 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 22 treesize of output 20 [2023-02-16 03:09:14,658 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2023-02-16 03:09:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:09:14,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79673977] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:09:14,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:09:14,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2023-02-16 03:09:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011134400] [2023-02-16 03:09:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:09:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-16 03:09:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:09:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-16 03:09:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=6606, Unknown=9, NotChecked=0, Total=7310 [2023-02-16 03:09:14,927 INFO L87 Difference]: Start difference. First operand 159 states and 174 transitions. Second operand has 86 states, 86 states have (on average 3.8372093023255816) internal successors, (330), 86 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:09:17,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:22,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:27,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:29,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:35,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:36,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-16 03:09:55,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]