./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 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/cstrncat-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 d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:56:25,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:56:25,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:56:25,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:56:25,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:56:25,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:56:25,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:56:25,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:56:25,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:56:25,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:56:25,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:56:25,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:56:25,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:56:25,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:56:25,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:56:25,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:56:25,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:56:25,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:56:25,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:56:25,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:56:25,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:56:25,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:56:25,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:56:25,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:56:25,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:56:26,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:56:26,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:56:26,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:56:26,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:56:26,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:56:26,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:56:26,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:56:26,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:56:26,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:56:26,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:56:26,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:56:26,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:56:26,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:56:26,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:56:26,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:56:26,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:56:26,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 00:56:26,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:56:26,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:56:26,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:56:26,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:56:26,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:56:26,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:56:26,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:56:26,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:56:26,049 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:56:26,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:56:26,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:56:26,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:56:26,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 00:56:26,052 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:56:26,052 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:56:26,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:56:26,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:56:26,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:56:26,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:56:26,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:56:26,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:56:26,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:56:26,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:56:26,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:56:26,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:56:26,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:56:26,054 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:56:26,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2023-02-15 00:56:26,250 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:56:26,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:56:26,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:56:26,307 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:56:26,309 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:56:26,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2023-02-15 00:56:27,321 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:56:27,749 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:56:27,750 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2023-02-15 00:56:27,776 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abda2ba12/c2baae65a41142d5a9744febb2441f91/FLAGf7b924550 [2023-02-15 00:56:27,800 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abda2ba12/c2baae65a41142d5a9744febb2441f91 [2023-02-15 00:56:27,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:56:27,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:56:27,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:56:27,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:56:27,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:56:27,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:56:27" (1/1) ... [2023-02-15 00:56:27,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5854a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:27, skipping insertion in model container [2023-02-15 00:56:27,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:56:27" (1/1) ... [2023-02-15 00:56:27,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:56:27,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:56:28,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:56:28,315 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:56:28,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:56:28,394 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:56:28,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28 WrapperNode [2023-02-15 00:56:28,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:56:28,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:56:28,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:56:28,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:56:28,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,457 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2023-02-15 00:56:28,457 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:56:28,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:56:28,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:56:28,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:56:28,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:56:28,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:56:28,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:56:28,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:56:28,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (1/1) ... [2023-02-15 00:56:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:56:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:28,542 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) [2023-02-15 00:56:28,597 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 [2023-02-15 00:56:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 00:56:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 00:56:28,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 00:56:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 00:56:28,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:56:28,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:56:28,754 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:56:28,756 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:56:28,936 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:56:28,941 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:56:28,941 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 00:56:28,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:28 BoogieIcfgContainer [2023-02-15 00:56:28,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:56:28,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:56:28,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:56:28,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:56:28,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:56:27" (1/3) ... [2023-02-15 00:56:28,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3c261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:28, skipping insertion in model container [2023-02-15 00:56:28,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:56:28" (2/3) ... [2023-02-15 00:56:28,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3c261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:56:28, skipping insertion in model container [2023-02-15 00:56:28,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:56:28" (3/3) ... [2023-02-15 00:56:28,950 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2023-02-15 00:56:28,963 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:56:28,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-02-15 00:56:28,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:56:28,996 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;@251cefe2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:56:28,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-02-15 00:56:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 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) [2023-02-15 00:56:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 00:56:29,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:29,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:29,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2023-02-15 00:56:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:29,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781731436] [2023-02-15 00:56:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781731436] [2023-02-15 00:56:29,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781731436] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:29,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 00:56:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991035909] [2023-02-15 00:56:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 00:56:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 00:56:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 00:56:29,270 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 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) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:29,321 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-02-15 00:56:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 00:56:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 00:56:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:29,330 INFO L225 Difference]: With dead ends: 54 [2023-02-15 00:56:29,330 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 00:56:29,332 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 [2023-02-15 00:56:29,335 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:29,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 00:56:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 00:56:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-02-15 00:56:29,361 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2023-02-15 00:56:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-02-15 00:56:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-02-15 00:56:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 00:56:29,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:29,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:29,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 00:56:29,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2023-02-15 00:56:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:29,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365429906] [2023-02-15 00:56:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:29,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:29,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365429906] [2023-02-15 00:56:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365429906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:29,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:29,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:29,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829890962] [2023-02-15 00:56:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:29,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:56:29,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:56:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:56:29,443 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-02-15 00:56:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:29,499 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-02-15 00:56:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:56:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2023-02-15 00:56:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:29,501 INFO L225 Difference]: With dead ends: 54 [2023-02-15 00:56:29,501 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 00:56:29,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:56:29,502 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:29,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 00:56:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-15 00:56:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 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) [2023-02-15 00:56:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-02-15 00:56:29,506 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2023-02-15 00:56:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:29,506 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-02-15 00:56:29,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-02-15 00:56:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-02-15 00:56:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 00:56:29,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:29,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:29,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 00:56:29,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2023-02-15 00:56:29,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:29,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568787977] [2023-02-15 00:56:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:29,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:29,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568787977] [2023-02-15 00:56:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568787977] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:29,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 00:56:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685531918] [2023-02-15 00:56:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:29,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 00:56:29,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 00:56:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 00:56:29,683 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-02-15 00:56:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:29,714 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-02-15 00:56:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 00:56:29,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2023-02-15 00:56:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:29,715 INFO L225 Difference]: With dead ends: 49 [2023-02-15 00:56:29,716 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 00:56:29,716 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 [2023-02-15 00:56:29,717 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:29,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 00:56:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-15 00:56:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-15 00:56:29,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2023-02-15 00:56:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:29,721 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-15 00:56:29,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2023-02-15 00:56:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-15 00:56:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 00:56:29,722 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:29,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:29,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 00:56:29,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2023-02-15 00:56:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:29,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443431053] [2023-02-15 00:56:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:29,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:29,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443431053] [2023-02-15 00:56:29,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443431053] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:29,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:29,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:29,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926215897] [2023-02-15 00:56:29,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:29,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:29,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:29,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:56:29,874 INFO L87 Difference]: Start difference. First operand 49 states and 56 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) [2023-02-15 00:56:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:29,975 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-02-15 00:56:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:29,976 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 [2023-02-15 00:56:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:29,976 INFO L225 Difference]: With dead ends: 91 [2023-02-15 00:56:29,977 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 00:56:29,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 00:56:29,978 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 241 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:29,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 95 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 00:56:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-02-15 00:56:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-02-15 00:56:29,983 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2023-02-15 00:56:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-02-15 00:56:29,983 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) [2023-02-15 00:56:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-02-15 00:56:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:56:29,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:29,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 00:56:29,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2023-02-15 00:56:29,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:29,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987905314] [2023-02-15 00:56:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:29,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987905314] [2023-02-15 00:56:30,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987905314] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604600513] [2023-02-15 00:56:30,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:56:30,191 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,411 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-15 00:56:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 00:56:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,413 INFO L225 Difference]: With dead ends: 136 [2023-02-15 00:56:30,415 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 00:56:30,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 00:56:30,416 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 187 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 174 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 00:56:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 59. [2023-02-15 00:56:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-02-15 00:56:30,430 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 10 [2023-02-15 00:56:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-02-15 00:56:30,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-02-15 00:56:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:56:30,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 00:56:30,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2023-02-15 00:56:30,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361791255] [2023-02-15 00:56:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361791255] [2023-02-15 00:56:30,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361791255] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 00:56:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371368173] [2023-02-15 00:56:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 00:56:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 00:56:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:56:30,495 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,515 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2023-02-15 00:56:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 00:56:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 00:56:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,516 INFO L225 Difference]: With dead ends: 106 [2023-02-15 00:56:30,516 INFO L226 Difference]: Without dead ends: 106 [2023-02-15 00:56:30,516 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 [2023-02-15 00:56:30,519 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-15 00:56:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2023-02-15 00:56:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 72 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) [2023-02-15 00:56:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2023-02-15 00:56:30,533 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 10 [2023-02-15 00:56:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,534 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2023-02-15 00:56:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2023-02-15 00:56:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:56:30,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 00:56:30,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash -61508313, now seen corresponding path program 1 times [2023-02-15 00:56:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89039722] [2023-02-15 00:56:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89039722] [2023-02-15 00:56:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89039722] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905908944] [2023-02-15 00:56:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:56:30,633 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,675 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2023-02-15 00:56:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 00:56:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,676 INFO L225 Difference]: With dead ends: 72 [2023-02-15 00:56:30,677 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 00:56:30,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:56:30,677 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 00:56:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-02-15 00:56:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-02-15 00:56:30,680 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2023-02-15 00:56:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,680 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-02-15 00:56:30,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-02-15 00:56:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:56:30,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 00:56:30,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2023-02-15 00:56:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566115778] [2023-02-15 00:56:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566115778] [2023-02-15 00:56:30,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566115778] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166990387] [2023-02-15 00:56:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:56:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:56:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:56:30,717 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,767 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2023-02-15 00:56:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 00:56:30,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 00:56:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,768 INFO L225 Difference]: With dead ends: 129 [2023-02-15 00:56:30,769 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 00:56:30,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:56:30,769 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 124 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 165 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 00:56:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 60. [2023-02-15 00:56:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-02-15 00:56:30,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2023-02-15 00:56:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,772 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-02-15 00:56:30,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-02-15 00:56:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 00:56:30,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 00:56:30,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash 613202234, now seen corresponding path program 1 times [2023-02-15 00:56:30,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859851527] [2023-02-15 00:56:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859851527] [2023-02-15 00:56:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859851527] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 00:56:30,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808115093] [2023-02-15 00:56:30,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 00:56:30,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 00:56:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 00:56:30,801 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,817 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-02-15 00:56:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 00:56:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-02-15 00:56:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,818 INFO L225 Difference]: With dead ends: 58 [2023-02-15 00:56:30,818 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 00:56:30,818 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 [2023-02-15 00:56:30,819 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 00:56:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-15 00:56:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-02-15 00:56:30,821 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 11 [2023-02-15 00:56:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,821 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-02-15 00:56:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-02-15 00:56:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 00:56:30,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 00:56:30,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2023-02-15 00:56:30,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322637576] [2023-02-15 00:56:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:30,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:30,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322637576] [2023-02-15 00:56:30,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322637576] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:30,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:30,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 00:56:30,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025342898] [2023-02-15 00:56:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:30,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 00:56:30,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:30,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 00:56:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:56:30,894 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:30,934 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2023-02-15 00:56:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 00:56:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-02-15 00:56:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:30,935 INFO L225 Difference]: With dead ends: 89 [2023-02-15 00:56:30,935 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 00:56:30,935 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 [2023-02-15 00:56:30,936 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:30,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 00:56:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2023-02-15 00:56:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2023-02-15 00:56:30,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2023-02-15 00:56:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:30,939 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2023-02-15 00:56:30,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2023-02-15 00:56:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 00:56:30,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:30,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 00:56:30,940 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:30,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash -196144391, now seen corresponding path program 1 times [2023-02-15 00:56:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:30,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676216130] [2023-02-15 00:56:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:31,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676216130] [2023-02-15 00:56:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676216130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:31,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:31,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 00:56:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494809580] [2023-02-15 00:56:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:56:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:56:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:56:31,008 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:31,031 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2023-02-15 00:56:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:56:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-02-15 00:56:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:31,032 INFO L225 Difference]: With dead ends: 61 [2023-02-15 00:56:31,032 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 00:56:31,032 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 [2023-02-15 00:56:31,032 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:31,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 35 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 00:56:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-02-15 00:56:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2023-02-15 00:56:31,035 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2023-02-15 00:56:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:31,035 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2023-02-15 00:56:31,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2023-02-15 00:56:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 00:56:31,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:31,036 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:31,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 00:56:31,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2023-02-15 00:56:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:31,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213992214] [2023-02-15 00:56:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:31,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213992214] [2023-02-15 00:56:31,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213992214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:31,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059364432] [2023-02-15 00:56:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:31,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:31,184 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) [2023-02-15 00:56:31,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 00:56:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 00:56:31,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:31,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-02-15 00:56:31,299 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 10 treesize of output 8 [2023-02-15 00:56:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:31,566 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:31,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059364432] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:31,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:31,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-15 00:56:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879445258] [2023-02-15 00:56:31,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:31,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 00:56:31,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 00:56:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-02-15 00:56:31,615 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 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) [2023-02-15 00:56:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:31,818 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2023-02-15 00:56:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 00:56:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 00:56:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:31,819 INFO L225 Difference]: With dead ends: 128 [2023-02-15 00:56:31,819 INFO L226 Difference]: Without dead ends: 128 [2023-02-15 00:56:31,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2023-02-15 00:56:31,820 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 478 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:31,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 294 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-15 00:56:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2023-02-15 00:56:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-15 00:56:31,821 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2023-02-15 00:56:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:31,821 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-15 00:56:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 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) [2023-02-15 00:56:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-15 00:56:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 00:56:31,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:31,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:31,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:32,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 00:56:32,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2023-02-15 00:56:32,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:32,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160497526] [2023-02-15 00:56:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:32,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:32,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:32,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160497526] [2023-02-15 00:56:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160497526] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:32,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:32,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 00:56:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623462398] [2023-02-15 00:56:32,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 00:56:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 00:56:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:56:32,056 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2023-02-15 00:56:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:32,080 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-02-15 00:56:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 00:56:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 [2023-02-15 00:56:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:32,081 INFO L225 Difference]: With dead ends: 49 [2023-02-15 00:56:32,081 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 00:56:32,081 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 [2023-02-15 00:56:32,081 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 55 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:32,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 00:56:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-15 00:56:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-02-15 00:56:32,083 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2023-02-15 00:56:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:32,083 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-02-15 00:56:32,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2023-02-15 00:56:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-02-15 00:56:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 00:56:32,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:32,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:32,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 00:56:32,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2023-02-15 00:56:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:32,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380664908] [2023-02-15 00:56:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:32,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380664908] [2023-02-15 00:56:32,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380664908] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:32,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:32,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127093880] [2023-02-15 00:56:32,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:32,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:56:32,146 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2023-02-15 00:56:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:32,215 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-02-15 00:56:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 [2023-02-15 00:56:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:32,216 INFO L225 Difference]: With dead ends: 72 [2023-02-15 00:56:32,216 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 00:56:32,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 00:56:32,217 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 00:56:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2023-02-15 00:56:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2023-02-15 00:56:32,218 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2023-02-15 00:56:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:32,219 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2023-02-15 00:56:32,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2023-02-15 00:56:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2023-02-15 00:56:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 00:56:32,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:32,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 00:56:32,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2023-02-15 00:56:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814031291] [2023-02-15 00:56:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:32,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:32,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814031291] [2023-02-15 00:56:32,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814031291] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:32,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51687801] [2023-02-15 00:56:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:32,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:32,346 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) [2023-02-15 00:56:32,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 00:56:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 00:56:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:32,414 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 00:56:32,414 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 00:56:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:32,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 00:56:32,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51687801] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:32,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:56:32,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-02-15 00:56:32,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608427228] [2023-02-15 00:56:32,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:32,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-15 00:56:32,493 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:32,534 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-02-15 00:56:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-02-15 00:56:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:32,536 INFO L225 Difference]: With dead ends: 59 [2023-02-15 00:56:32,536 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 00:56:32,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 00:56:32,537 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:32,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 00:56:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-15 00:56:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2023-02-15 00:56:32,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 14 [2023-02-15 00:56:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:32,541 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2023-02-15 00:56:32,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2023-02-15 00:56:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 00:56:32,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:32,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:32,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 00:56:32,748 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,SelfDestructingSolverStorable14 [2023-02-15 00:56:32,748 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2023-02-15 00:56:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265882835] [2023-02-15 00:56:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:32,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265882835] [2023-02-15 00:56:33,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265882835] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:33,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955617534] [2023-02-15 00:56:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:33,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:33,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:33,102 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) [2023-02-15 00:56:33,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 00:56:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 00:56:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:33,339 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 [2023-02-15 00:56:33,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:33,395 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-02-15 00:56:33,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 00:56:33,491 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:33,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:33,493 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 20 treesize of output 10 [2023-02-15 00:56:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:33,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 00:56:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955617534] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:33,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:56:33,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2023-02-15 00:56:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124362546] [2023-02-15 00:56:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 00:56:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 00:56:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-15 00:56:33,507 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:33,738 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2023-02-15 00:56:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 00:56:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2023-02-15 00:56:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:33,739 INFO L225 Difference]: With dead ends: 161 [2023-02-15 00:56:33,739 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 00:56:33,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-02-15 00:56:33,739 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 211 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:33,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 362 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 00:56:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 67. [2023-02-15 00:56:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-02-15 00:56:33,741 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 15 [2023-02-15 00:56:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:33,741 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-02-15 00:56:33,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-02-15 00:56:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 00:56:33,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:33,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:33,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:33,948 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1076776055, now seen corresponding path program 1 times [2023-02-15 00:56:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214816478] [2023-02-15 00:56:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214816478] [2023-02-15 00:56:34,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214816478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342004816] [2023-02-15 00:56:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:34,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:34,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:34,103 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) [2023-02-15 00:56:34,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 00:56:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 00:56:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:34,174 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 10 treesize of output 8 [2023-02-15 00:56:34,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:56:34,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:56:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:34,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:34,351 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 20 treesize of output 10 [2023-02-15 00:56:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:34,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 00:56:34,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342004816] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:34,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:56:34,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2023-02-15 00:56:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385341893] [2023-02-15 00:56:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:34,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 00:56:34,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:34,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 00:56:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-15 00:56:34,366 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:34,584 INFO L93 Difference]: Finished difference Result 134 states and 159 transitions. [2023-02-15 00:56:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 00:56:34,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2023-02-15 00:56:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:34,585 INFO L225 Difference]: With dead ends: 134 [2023-02-15 00:56:34,585 INFO L226 Difference]: Without dead ends: 134 [2023-02-15 00:56:34,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-02-15 00:56:34,586 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 306 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:34,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 182 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-15 00:56:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 67. [2023-02-15 00:56:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-02-15 00:56:34,588 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 15 [2023-02-15 00:56:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:34,589 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-02-15 00:56:34,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-02-15 00:56:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 00:56:34,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:34,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:34,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 00:56:34,801 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2023-02-15 00:56:34,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961599188] [2023-02-15 00:56:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:34,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:34,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:34,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961599188] [2023-02-15 00:56:34,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961599188] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:34,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:34,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 00:56:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354121010] [2023-02-15 00:56:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:34,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:56:34,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:56:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:56:34,874 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:34,923 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-02-15 00:56:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:56:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2023-02-15 00:56:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:34,924 INFO L225 Difference]: With dead ends: 68 [2023-02-15 00:56:34,924 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 00:56:34,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:56:34,924 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:34,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 77 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 00:56:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-02-15 00:56:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2023-02-15 00:56:34,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 17 [2023-02-15 00:56:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:34,928 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2023-02-15 00:56:34,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2023-02-15 00:56:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 00:56:34,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:34,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 00:56:34,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2023-02-15 00:56:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:34,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158332796] [2023-02-15 00:56:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:34,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158332796] [2023-02-15 00:56:35,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158332796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:35,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 00:56:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938924682] [2023-02-15 00:56:35,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:35,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 00:56:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 00:56:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 00:56:35,126 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:35,230 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2023-02-15 00:56:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 00:56:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2023-02-15 00:56:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:35,231 INFO L225 Difference]: With dead ends: 91 [2023-02-15 00:56:35,231 INFO L226 Difference]: Without dead ends: 91 [2023-02-15 00:56:35,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-15 00:56:35,231 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 174 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:35,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 93 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-15 00:56:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2023-02-15 00:56:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2023-02-15 00:56:35,233 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 17 [2023-02-15 00:56:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:35,233 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2023-02-15 00:56:35,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2023-02-15 00:56:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 00:56:35,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:35,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:35,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 00:56:35,234 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -795987946, now seen corresponding path program 1 times [2023-02-15 00:56:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28454125] [2023-02-15 00:56:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28454125] [2023-02-15 00:56:35,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28454125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:35,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438719724] [2023-02-15 00:56:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:35,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:35,350 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) [2023-02-15 00:56:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 00:56:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 00:56:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:35,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:35,524 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 7 treesize of output 5 [2023-02-15 00:56:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:35,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438719724] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:35,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:35,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-15 00:56:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175009481] [2023-02-15 00:56:35,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 00:56:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 00:56:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-15 00:56:35,545 INFO L87 Difference]: Start difference. First operand 71 states and 89 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) [2023-02-15 00:56:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:35,726 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2023-02-15 00:56:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 00:56:35,727 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 19 [2023-02-15 00:56:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:35,727 INFO L225 Difference]: With dead ends: 139 [2023-02-15 00:56:35,727 INFO L226 Difference]: Without dead ends: 139 [2023-02-15 00:56:35,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-02-15 00:56:35,728 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 513 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:35,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 317 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-15 00:56:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 78. [2023-02-15 00:56:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.36986301369863) internal successors, (100), 77 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-02-15 00:56:35,730 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 19 [2023-02-15 00:56:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:35,730 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-02-15 00:56:35,730 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) [2023-02-15 00:56:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-02-15 00:56:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 00:56:35,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:35,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:35,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:35,937 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -440236817, now seen corresponding path program 2 times [2023-02-15 00:56:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228770328] [2023-02-15 00:56:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:36,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228770328] [2023-02-15 00:56:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228770328] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:36,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2943144] [2023-02-15 00:56:36,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:56:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:36,176 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) [2023-02-15 00:56:36,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 00:56:36,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:56:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 00:56:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:36,272 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 10 treesize of output 8 [2023-02-15 00:56:36,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:56:36,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:56:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:36,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:36,663 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 20 treesize of output 10 [2023-02-15 00:56:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:36,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:36,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:36,901 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:56:36,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:36,906 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 40 treesize of output 34 [2023-02-15 00:56:36,909 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 7 treesize of output 3 [2023-02-15 00:56:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:37,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2943144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:37,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:37,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 28 [2023-02-15 00:56:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886625240] [2023-02-15 00:56:37,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 00:56:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 00:56:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=681, Unknown=1, NotChecked=0, Total=756 [2023-02-15 00:56:37,101 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:39,746 INFO L93 Difference]: Finished difference Result 555 states and 650 transitions. [2023-02-15 00:56:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 00:56:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 00:56:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:39,748 INFO L225 Difference]: With dead ends: 555 [2023-02-15 00:56:39,748 INFO L226 Difference]: Without dead ends: 555 [2023-02-15 00:56:39,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=675, Invalid=3484, Unknown=1, NotChecked=0, Total=4160 [2023-02-15 00:56:39,750 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1617 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:39,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 1304 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 00:56:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-02-15 00:56:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 154. [2023-02-15 00:56:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.308724832214765) internal successors, (195), 153 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2023-02-15 00:56:39,759 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 21 [2023-02-15 00:56:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:39,759 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2023-02-15 00:56:39,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2023-02-15 00:56:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 00:56:39,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:39,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:39,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:39,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:39,965 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1521709535, now seen corresponding path program 1 times [2023-02-15 00:56:39,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:39,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648165434] [2023-02-15 00:56:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:39,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648165434] [2023-02-15 00:56:39,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648165434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:39,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 00:56:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328743708] [2023-02-15 00:56:39,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:39,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 00:56:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 00:56:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 00:56:39,997 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:40,004 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2023-02-15 00:56:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 00:56:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 00:56:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:40,021 INFO L225 Difference]: With dead ends: 152 [2023-02-15 00:56:40,022 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 00:56:40,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 00:56:40,025 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:40,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 00:56:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2023-02-15 00:56:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2797202797202798) internal successors, (183), 147 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2023-02-15 00:56:40,027 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 21 [2023-02-15 00:56:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:40,028 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2023-02-15 00:56:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2023-02-15 00:56:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 00:56:40,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:40,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:40,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 00:56:40,029 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2023-02-15 00:56:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:40,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663347474] [2023-02-15 00:56:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:40,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:40,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663347474] [2023-02-15 00:56:40,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663347474] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:40,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:40,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:56:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629924479] [2023-02-15 00:56:40,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:40,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:56:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:56:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:56:40,112 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:40,140 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2023-02-15 00:56:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 00:56:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 00:56:40,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:40,152 INFO L225 Difference]: With dead ends: 161 [2023-02-15 00:56:40,152 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 00:56:40,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 00:56:40,153 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:40,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 102 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:40,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 00:56:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2023-02-15 00:56:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2587412587412588) internal successors, (180), 147 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 180 transitions. [2023-02-15 00:56:40,156 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 180 transitions. Word has length 22 [2023-02-15 00:56:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:40,156 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 180 transitions. [2023-02-15 00:56:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2023-02-15 00:56:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 00:56:40,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:40,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:40,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 00:56:40,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2023-02-15 00:56:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:40,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399808222] [2023-02-15 00:56:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:40,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399808222] [2023-02-15 00:56:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399808222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119481111] [2023-02-15 00:56:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:40,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:40,331 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) [2023-02-15 00:56:40,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 00:56:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:40,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 00:56:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:40,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:40,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119481111] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:40,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:40,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-15 00:56:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858587579] [2023-02-15 00:56:40,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 00:56:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 00:56:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:56:40,462 INFO L87 Difference]: Start difference. First operand 148 states and 180 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:40,503 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2023-02-15 00:56:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 00:56:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 00:56:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:40,505 INFO L225 Difference]: With dead ends: 194 [2023-02-15 00:56:40,505 INFO L226 Difference]: Without dead ends: 194 [2023-02-15 00:56:40,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 00:56:40,506 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:40,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-15 00:56:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2023-02-15 00:56:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2407407407407407) internal successors, (201), 166 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2023-02-15 00:56:40,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 23 [2023-02-15 00:56:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:40,509 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2023-02-15 00:56:40,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2023-02-15 00:56:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 00:56:40,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:40,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:40,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2023-02-15 00:56:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:40,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330945432] [2023-02-15 00:56:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330945432] [2023-02-15 00:56:40,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330945432] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:40,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:40,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 00:56:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544468930] [2023-02-15 00:56:40,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 00:56:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 00:56:40,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-15 00:56:40,902 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:41,008 INFO L93 Difference]: Finished difference Result 243 states and 285 transitions. [2023-02-15 00:56:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 00:56:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 00:56:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:41,009 INFO L225 Difference]: With dead ends: 243 [2023-02-15 00:56:41,009 INFO L226 Difference]: Without dead ends: 243 [2023-02-15 00:56:41,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-02-15 00:56:41,010 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:41,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 252 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-15 00:56:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 195. [2023-02-15 00:56:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.231578947368421) internal successors, (234), 194 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 234 transitions. [2023-02-15 00:56:41,016 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 234 transitions. Word has length 23 [2023-02-15 00:56:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 234 transitions. [2023-02-15 00:56:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 234 transitions. [2023-02-15 00:56:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 00:56:41,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:41,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:41,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 00:56:41,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2023-02-15 00:56:41,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:41,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431432849] [2023-02-15 00:56:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:41,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431432849] [2023-02-15 00:56:41,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431432849] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:41,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:41,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 00:56:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162218882] [2023-02-15 00:56:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:41,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 00:56:41,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 00:56:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-15 00:56:41,183 INFO L87 Difference]: Start difference. First operand 195 states and 234 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:41,302 INFO L93 Difference]: Finished difference Result 225 states and 264 transitions. [2023-02-15 00:56:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 00:56:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 00:56:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:41,303 INFO L225 Difference]: With dead ends: 225 [2023-02-15 00:56:41,303 INFO L226 Difference]: Without dead ends: 225 [2023-02-15 00:56:41,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-15 00:56:41,304 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:41,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 213 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-15 00:56:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 183. [2023-02-15 00:56:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.247191011235955) internal successors, (222), 182 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) [2023-02-15 00:56:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 222 transitions. [2023-02-15 00:56:41,309 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 222 transitions. Word has length 23 [2023-02-15 00:56:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:41,309 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 222 transitions. [2023-02-15 00:56:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 222 transitions. [2023-02-15 00:56:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 00:56:41,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:41,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 00:56:41,311 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2023-02-15 00:56:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:41,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778145346] [2023-02-15 00:56:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778145346] [2023-02-15 00:56:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778145346] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:41,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:41,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 00:56:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790574558] [2023-02-15 00:56:41,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:41,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 00:56:41,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 00:56:41,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 00:56:41,422 INFO L87 Difference]: Start difference. First operand 183 states and 222 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:41,437 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2023-02-15 00:56:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 00:56:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 00:56:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:41,438 INFO L225 Difference]: With dead ends: 182 [2023-02-15 00:56:41,438 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 00:56:41,439 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 [2023-02-15 00:56:41,439 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:41,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:56:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 00:56:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-02-15 00:56:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 135 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) [2023-02-15 00:56:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2023-02-15 00:56:41,441 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 25 [2023-02-15 00:56:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:41,441 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2023-02-15 00:56:41,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2023-02-15 00:56:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 00:56:41,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:41,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 00:56:41,442 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 381723790, now seen corresponding path program 1 times [2023-02-15 00:56:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:41,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298044873] [2023-02-15 00:56:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:41,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:41,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298044873] [2023-02-15 00:56:41,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298044873] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375618917] [2023-02-15 00:56:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:41,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:41,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:41,633 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) [2023-02-15 00:56:41,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 00:56:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 00:56:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:41,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:41,919 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 7 treesize of output 5 [2023-02-15 00:56:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:41,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375618917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:41,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:41,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-02-15 00:56:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070207278] [2023-02-15 00:56:41,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:41,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 00:56:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 00:56:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-02-15 00:56:41,956 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:42,223 INFO L93 Difference]: Finished difference Result 197 states and 218 transitions. [2023-02-15 00:56:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 00:56:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-15 00:56:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:42,224 INFO L225 Difference]: With dead ends: 197 [2023-02-15 00:56:42,224 INFO L226 Difference]: Without dead ends: 195 [2023-02-15 00:56:42,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2023-02-15 00:56:42,224 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 264 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:42,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 333 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-02-15 00:56:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 132. [2023-02-15 00:56:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.1796875) internal successors, (151), 131 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2023-02-15 00:56:42,227 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 25 [2023-02-15 00:56:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:42,227 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2023-02-15 00:56:42,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2023-02-15 00:56:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 00:56:42,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:42,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:42,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:42,429 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,SelfDestructingSolverStorable27 [2023-02-15 00:56:42,429 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2023-02-15 00:56:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:42,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437241996] [2023-02-15 00:56:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:42,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:42,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437241996] [2023-02-15 00:56:42,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437241996] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:42,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906998883] [2023-02-15 00:56:42,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:56:42,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:42,741 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) [2023-02-15 00:56:42,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 00:56:42,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 00:56:42,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 00:56:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:42,972 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 [2023-02-15 00:56:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:43,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 00:56:43,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:43,314 INFO L321 Elim1Store]: treesize reduction 16, result has 60.0 percent of original size [2023-02-15 00:56:43,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 37 [2023-02-15 00:56:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:43,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:43,837 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 33 treesize of output 29 [2023-02-15 00:56:43,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:43,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 45 [2023-02-15 00:56:43,858 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 18 treesize of output 14 [2023-02-15 00:56:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:43,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906998883] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:43,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:43,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 32 [2023-02-15 00:56:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237190772] [2023-02-15 00:56:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:43,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 00:56:43,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 00:56:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 00:56:43,979 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:47,195 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2023-02-15 00:56:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 00:56:47,196 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 00:56:47,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:47,197 INFO L225 Difference]: With dead ends: 218 [2023-02-15 00:56:47,197 INFO L226 Difference]: Without dead ends: 208 [2023-02-15 00:56:47,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1048, Invalid=4652, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 00:56:47,199 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 687 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:47,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 681 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 00:56:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-02-15 00:56:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 138. [2023-02-15 00:56:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 137 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2023-02-15 00:56:47,201 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 27 [2023-02-15 00:56:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:47,201 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2023-02-15 00:56:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2023-02-15 00:56:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 00:56:47,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:47,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:47,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 00:56:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 00:56:47,402 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2023-02-15 00:56:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84857067] [2023-02-15 00:56:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84857067] [2023-02-15 00:56:47,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84857067] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:56:47,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:56:47,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 00:56:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926532828] [2023-02-15 00:56:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:56:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 00:56:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 00:56:47,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-15 00:56:47,589 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:47,692 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2023-02-15 00:56:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 00:56:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 00:56:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:47,693 INFO L225 Difference]: With dead ends: 206 [2023-02-15 00:56:47,693 INFO L226 Difference]: Without dead ends: 175 [2023-02-15 00:56:47,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 00:56:47,693 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:47,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 187 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-02-15 00:56:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2023-02-15 00:56:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 140 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2023-02-15 00:56:47,695 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 27 [2023-02-15 00:56:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:47,695 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2023-02-15 00:56:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2023-02-15 00:56:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 00:56:47,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:47,696 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:47,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 00:56:47,696 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2023-02-15 00:56:47,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829131348] [2023-02-15 00:56:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:47,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:47,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829131348] [2023-02-15 00:56:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829131348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043139858] [2023-02-15 00:56:47,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:56:47,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:47,948 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) [2023-02-15 00:56:47,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 00:56:48,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:56:48,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:48,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 00:56:48,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:48,201 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 [2023-02-15 00:56:48,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:48,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 00:56:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:48,430 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:48,436 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 00:56:48,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 21 [2023-02-15 00:56:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:48,537 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 35 treesize of output 31 [2023-02-15 00:56:48,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:48,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2023-02-15 00:56:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:48,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043139858] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:48,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:48,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 32 [2023-02-15 00:56:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840959496] [2023-02-15 00:56:48,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 00:56:48,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 00:56:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-02-15 00:56:48,774 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:49,771 INFO L93 Difference]: Finished difference Result 285 states and 314 transitions. [2023-02-15 00:56:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 00:56:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-15 00:56:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:49,772 INFO L225 Difference]: With dead ends: 285 [2023-02-15 00:56:49,772 INFO L226 Difference]: Without dead ends: 250 [2023-02-15 00:56:49,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 00:56:49,773 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 316 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:49,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 647 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:56:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-15 00:56:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 164. [2023-02-15 00:56:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.18125) internal successors, (189), 163 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2023-02-15 00:56:49,776 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 29 [2023-02-15 00:56:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:49,777 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2023-02-15 00:56:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2023-02-15 00:56:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 00:56:49,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:49,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:49,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-15 00:56:49,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-15 00:56:49,979 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2023-02-15 00:56:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299407323] [2023-02-15 00:56:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:50,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:50,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299407323] [2023-02-15 00:56:50,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299407323] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:50,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188538428] [2023-02-15 00:56:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:50,645 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) [2023-02-15 00:56:50,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 00:56:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 00:56:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:50,903 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 [2023-02-15 00:56:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:50,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188538428] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:50,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:50,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2023-02-15 00:56:50,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455392924] [2023-02-15 00:56:50,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 00:56:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 00:56:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 00:56:50,921 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:51,121 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2023-02-15 00:56:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 00:56:51,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2023-02-15 00:56:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:51,122 INFO L225 Difference]: With dead ends: 197 [2023-02-15 00:56:51,122 INFO L226 Difference]: Without dead ends: 197 [2023-02-15 00:56:51,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-02-15 00:56:51,123 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 235 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:56:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-15 00:56:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2023-02-15 00:56:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 175 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 201 transitions. [2023-02-15 00:56:51,126 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 201 transitions. Word has length 31 [2023-02-15 00:56:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:51,126 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 201 transitions. [2023-02-15 00:56:51,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 201 transitions. [2023-02-15 00:56:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 00:56:51,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:51,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:51,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:51,327 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,SelfDestructingSolverStorable31 [2023-02-15 00:56:51,327 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2023-02-15 00:56:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:51,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555653962] [2023-02-15 00:56:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555653962] [2023-02-15 00:56:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555653962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491571073] [2023-02-15 00:56:51,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:56:51,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:51,677 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) [2023-02-15 00:56:51,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 00:56:51,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 00:56:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:51,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-15 00:56:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:51,770 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 10 treesize of output 8 [2023-02-15 00:56:51,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:56:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:56:52,157 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 00:56:52,157 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 10 [2023-02-15 00:56:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:52,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:52,304 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_460) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2023-02-15 00:56:52,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:52,309 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:56:52,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:56:52,314 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 40 treesize of output 34 [2023-02-15 00:56:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491571073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:52,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2023-02-15 00:56:52,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655554694] [2023-02-15 00:56:52,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 00:56:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 00:56:52,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=973, Unknown=1, NotChecked=62, Total=1122 [2023-02-15 00:56:52,454 INFO L87 Difference]: Start difference. First operand 176 states and 201 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:55,190 INFO L93 Difference]: Finished difference Result 473 states and 513 transitions. [2023-02-15 00:56:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 00:56:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-15 00:56:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:55,191 INFO L225 Difference]: With dead ends: 473 [2023-02-15 00:56:55,191 INFO L226 Difference]: Without dead ends: 410 [2023-02-15 00:56:55,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=593, Invalid=4378, Unknown=3, NotChecked=138, Total=5112 [2023-02-15 00:56:55,192 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 804 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:55,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 1429 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1481 Invalid, 1 Unknown, 165 Unchecked, 0.8s Time] [2023-02-15 00:56:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-02-15 00:56:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 230. [2023-02-15 00:56:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.154867256637168) internal successors, (261), 229 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2023-02-15 00:56:55,205 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 33 [2023-02-15 00:56:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:55,205 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2023-02-15 00:56:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2023-02-15 00:56:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 00:56:55,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:55,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:55,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:55,412 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,SelfDestructingSolverStorable32 [2023-02-15 00:56:55,413 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 226932702, now seen corresponding path program 1 times [2023-02-15 00:56:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310001792] [2023-02-15 00:56:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310001792] [2023-02-15 00:56:55,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310001792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818608506] [2023-02-15 00:56:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:55,723 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) [2023-02-15 00:56:55,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 00:56:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 00:56:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:56:55,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 00:56:55,860 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 10 treesize of output 8 [2023-02-15 00:56:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:56,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:56:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:56:56,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818608506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:56,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:56,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-02-15 00:56:56,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645849864] [2023-02-15 00:56:56,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:56,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 00:56:56,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:56,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 00:56:56,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-02-15 00:56:56,387 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:57,100 INFO L93 Difference]: Finished difference Result 284 states and 316 transitions. [2023-02-15 00:56:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 00:56:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-15 00:56:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:57,101 INFO L225 Difference]: With dead ends: 284 [2023-02-15 00:56:57,101 INFO L226 Difference]: Without dead ends: 280 [2023-02-15 00:56:57,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 00:56:57,102 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 651 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:57,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 206 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:56:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-02-15 00:56:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 234. [2023-02-15 00:56:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1565217391304348) internal successors, (266), 233 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 266 transitions. [2023-02-15 00:56:57,107 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 266 transitions. Word has length 34 [2023-02-15 00:56:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:57,107 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 266 transitions. [2023-02-15 00:56:57,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 266 transitions. [2023-02-15 00:56:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 00:56:57,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:57,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:57,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 00:56:57,314 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,SelfDestructingSolverStorable33 [2023-02-15 00:56:57,314 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:57,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1027549510, now seen corresponding path program 2 times [2023-02-15 00:56:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523648754] [2023-02-15 00:56:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:57,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:57,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523648754] [2023-02-15 00:56:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523648754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108701000] [2023-02-15 00:56:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:56:57,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:57,538 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) [2023-02-15 00:56:57,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 00:56:57,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:56:57,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 00:56:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:56:57,916 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 7 treesize of output 5 [2023-02-15 00:56:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:57,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108701000] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:56:57,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:56:57,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2023-02-15 00:56:57,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864581975] [2023-02-15 00:56:57,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:56:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 00:56:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:56:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 00:56:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-02-15 00:56:57,980 INFO L87 Difference]: Start difference. First operand 234 states and 266 transitions. Second operand has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:56:58,471 INFO L93 Difference]: Finished difference Result 427 states and 468 transitions. [2023-02-15 00:56:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 00:56:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 00:56:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:56:58,473 INFO L225 Difference]: With dead ends: 427 [2023-02-15 00:56:58,473 INFO L226 Difference]: Without dead ends: 423 [2023-02-15 00:56:58,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 00:56:58,473 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 552 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:56:58,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 808 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:56:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-15 00:56:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 243. [2023-02-15 00:56:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.1589958158995817) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2023-02-15 00:56:58,477 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 37 [2023-02-15 00:56:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:56:58,478 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2023-02-15 00:56:58,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.740740740740741) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:56:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2023-02-15 00:56:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 00:56:58,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:56:58,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:56:58,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 00:56:58,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:58,684 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:56:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:56:58,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2023-02-15 00:56:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:56:58,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043660344] [2023-02-15 00:56:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:56:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:56:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:56:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:56:59,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:56:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043660344] [2023-02-15 00:56:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043660344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:56:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859685993] [2023-02-15 00:56:59,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:56:59,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:56:59,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:56:59,584 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) [2023-02-15 00:56:59,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 00:56:59,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:56:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:56:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 00:56:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:56:59,927 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 [2023-02-15 00:57:00,263 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-15 00:57:00,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2023-02-15 00:57:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:00,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2023-02-15 00:57:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:00,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:00,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:00,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2023-02-15 00:57:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:00,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:00,888 INFO L321 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2023-02-15 00:57:00,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 87 [2023-02-15 00:57:00,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:00,898 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 49 treesize of output 51 [2023-02-15 00:57:00,905 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 11 treesize of output 7 [2023-02-15 00:57:00,925 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 6 treesize of output 4 [2023-02-15 00:57:00,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:00,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2023-02-15 00:57:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:01,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859685993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:01,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:01,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2023-02-15 00:57:01,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682322095] [2023-02-15 00:57:01,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:01,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 00:57:01,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 00:57:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1846, Unknown=7, NotChecked=0, Total=2070 [2023-02-15 00:57:01,219 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:02,648 INFO L93 Difference]: Finished difference Result 267 states and 299 transitions. [2023-02-15 00:57:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 00:57:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 00:57:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:02,650 INFO L225 Difference]: With dead ends: 267 [2023-02-15 00:57:02,650 INFO L226 Difference]: Without dead ends: 230 [2023-02-15 00:57:02,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=856, Invalid=4248, Unknown=8, NotChecked=0, Total=5112 [2023-02-15 00:57:02,655 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 284 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:02,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 366 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:57:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-15 00:57:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2023-02-15 00:57:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.154867256637168) internal successors, (261), 229 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 261 transitions. [2023-02-15 00:57:02,666 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 261 transitions. Word has length 37 [2023-02-15 00:57:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:02,667 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 261 transitions. [2023-02-15 00:57:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 261 transitions. [2023-02-15 00:57:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 00:57:02,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:02,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:02,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:02,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:02,875 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 6 times [2023-02-15 00:57:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:02,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073245769] [2023-02-15 00:57:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:03,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073245769] [2023-02-15 00:57:03,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073245769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757427988] [2023-02-15 00:57:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:57:03,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:03,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:03,357 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) [2023-02-15 00:57:03,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 00:57:03,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-15 00:57:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 00:57:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:03,497 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 10 treesize of output 8 [2023-02-15 00:57:03,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:57:03,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:57:03,968 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 00:57:03,968 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 10 [2023-02-15 00:57:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:03,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:04,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:04,224 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:57:04,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:04,229 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 40 treesize of output 34 [2023-02-15 00:57:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:04,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757427988] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:04,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:04,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2023-02-15 00:57:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756833728] [2023-02-15 00:57:04,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:04,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 00:57:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 00:57:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1374, Unknown=5, NotChecked=0, Total=1482 [2023-02-15 00:57:04,392 INFO L87 Difference]: Start difference. First operand 230 states and 261 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:07,537 INFO L93 Difference]: Finished difference Result 566 states and 612 transitions. [2023-02-15 00:57:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 00:57:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 00:57:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:07,538 INFO L225 Difference]: With dead ends: 566 [2023-02-15 00:57:07,538 INFO L226 Difference]: Without dead ends: 497 [2023-02-15 00:57:07,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=700, Invalid=6101, Unknown=5, NotChecked=0, Total=6806 [2023-02-15 00:57:07,540 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 885 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:07,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1801 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 00:57:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-02-15 00:57:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 286. [2023-02-15 00:57:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.1418439716312057) internal successors, (322), 285 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 322 transitions. [2023-02-15 00:57:07,544 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 322 transitions. Word has length 39 [2023-02-15 00:57:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:07,544 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 322 transitions. [2023-02-15 00:57:07,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 322 transitions. [2023-02-15 00:57:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 00:57:07,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:07,548 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:07,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:07,748 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,SelfDestructingSolverStorable36 [2023-02-15 00:57:07,749 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1229052520, now seen corresponding path program 2 times [2023-02-15 00:57:07,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:07,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125066749] [2023-02-15 00:57:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:07,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125066749] [2023-02-15 00:57:08,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125066749] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234044057] [2023-02-15 00:57:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:57:08,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:08,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:08,037 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) [2023-02-15 00:57:08,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 00:57:08,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:57:08,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 00:57:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:08,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:08,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-02-15 00:57:08,206 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 10 treesize of output 8 [2023-02-15 00:57:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:09,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234044057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:09,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:09,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2023-02-15 00:57:09,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263525615] [2023-02-15 00:57:09,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 00:57:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 00:57:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 00:57:09,284 INFO L87 Difference]: Start difference. First operand 286 states and 322 transitions. Second operand has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:11,303 INFO L93 Difference]: Finished difference Result 373 states and 412 transitions. [2023-02-15 00:57:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 00:57:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2023-02-15 00:57:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:11,305 INFO L225 Difference]: With dead ends: 373 [2023-02-15 00:57:11,305 INFO L226 Difference]: Without dead ends: 367 [2023-02-15 00:57:11,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=775, Invalid=2647, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 00:57:11,306 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 759 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:11,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 301 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 00:57:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-15 00:57:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 343. [2023-02-15 00:57:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 339 states have (on average 1.135693215339233) internal successors, (385), 342 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 385 transitions. [2023-02-15 00:57:11,311 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 385 transitions. Word has length 40 [2023-02-15 00:57:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 385 transitions. [2023-02-15 00:57:11,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.189189189189189) internal successors, (118), 38 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 385 transitions. [2023-02-15 00:57:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 00:57:11,326 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:11,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:11,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:11,531 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,SelfDestructingSolverStorable37 [2023-02-15 00:57:11,533 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:11,533 INFO L85 PathProgramCache]: Analyzing trace with hash -103083227, now seen corresponding path program 3 times [2023-02-15 00:57:11,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:11,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869170363] [2023-02-15 00:57:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869170363] [2023-02-15 00:57:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869170363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342562535] [2023-02-15 00:57:11,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:57:11,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:11,969 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) [2023-02-15 00:57:11,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 00:57:12,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 00:57:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 00:57:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:12,242 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 [2023-02-15 00:57:12,458 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-15 00:57:12,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2023-02-15 00:57:12,463 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 [2023-02-15 00:57:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:12,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:12,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2023-02-15 00:57:12,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:12,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:12,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2023-02-15 00:57:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:12,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:12,851 INFO L321 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2023-02-15 00:57:12,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 87 [2023-02-15 00:57:12,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:12,859 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 49 treesize of output 51 [2023-02-15 00:57:12,875 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 11 treesize of output 7 [2023-02-15 00:57:12,901 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 6 treesize of output 4 [2023-02-15 00:57:12,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:12,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2023-02-15 00:57:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:13,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342562535] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:13,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:13,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 43 [2023-02-15 00:57:13,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788744918] [2023-02-15 00:57:13,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 00:57:13,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 00:57:13,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1609, Unknown=17, NotChecked=0, Total=1806 [2023-02-15 00:57:13,156 INFO L87 Difference]: Start difference. First operand 343 states and 385 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:14,756 INFO L93 Difference]: Finished difference Result 569 states and 624 transitions. [2023-02-15 00:57:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 00:57:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-15 00:57:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:14,758 INFO L225 Difference]: With dead ends: 569 [2023-02-15 00:57:14,758 INFO L226 Difference]: Without dead ends: 476 [2023-02-15 00:57:14,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=957, Invalid=4877, Unknown=18, NotChecked=0, Total=5852 [2023-02-15 00:57:14,759 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 459 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:14,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 479 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:57:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-02-15 00:57:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 399. [2023-02-15 00:57:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 1.1316455696202532) internal successors, (447), 398 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 447 transitions. [2023-02-15 00:57:14,772 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 447 transitions. Word has length 41 [2023-02-15 00:57:14,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:14,773 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 447 transitions. [2023-02-15 00:57:14,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 447 transitions. [2023-02-15 00:57:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 00:57:14,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:14,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:14,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:14,979 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,SelfDestructingSolverStorable38 [2023-02-15 00:57:14,980 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -732190480, now seen corresponding path program 3 times [2023-02-15 00:57:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:14,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733369703] [2023-02-15 00:57:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733369703] [2023-02-15 00:57:15,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733369703] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109482694] [2023-02-15 00:57:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:57:15,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:15,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:15,321 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) [2023-02-15 00:57:15,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 00:57:15,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 00:57:15,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 00:57:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:15,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:15,701 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 8 treesize of output 6 [2023-02-15 00:57:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:15,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109482694] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:15,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:15,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2023-02-15 00:57:15,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662844651] [2023-02-15 00:57:15,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:15,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 00:57:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 00:57:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 00:57:15,760 INFO L87 Difference]: Start difference. First operand 399 states and 447 transitions. Second operand has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:16,085 INFO L93 Difference]: Finished difference Result 664 states and 726 transitions. [2023-02-15 00:57:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 00:57:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 00:57:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:16,087 INFO L225 Difference]: With dead ends: 664 [2023-02-15 00:57:16,087 INFO L226 Difference]: Without dead ends: 652 [2023-02-15 00:57:16,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=473, Invalid=1879, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 00:57:16,088 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 545 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:16,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 724 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:57:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2023-02-15 00:57:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 436. [2023-02-15 00:57:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 432 states have (on average 1.1296296296296295) internal successors, (488), 435 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 488 transitions. [2023-02-15 00:57:16,100 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 488 transitions. Word has length 43 [2023-02-15 00:57:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:16,101 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 488 transitions. [2023-02-15 00:57:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 488 transitions. [2023-02-15 00:57:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 00:57:16,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:16,102 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:16,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:16,306 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,SelfDestructingSolverStorable39 [2023-02-15 00:57:16,307 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 7 times [2023-02-15 00:57:16,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:16,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920891054] [2023-02-15 00:57:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:16,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920891054] [2023-02-15 00:57:16,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920891054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274967487] [2023-02-15 00:57:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 00:57:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:16,789 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) [2023-02-15 00:57:16,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 00:57:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 00:57:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:16,901 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 10 treesize of output 8 [2023-02-15 00:57:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:57:17,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:57:17,505 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 00:57:17,505 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 10 [2023-02-15 00:57:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:17,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:17,762 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_763 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2023-02-15 00:57:17,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:17,766 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:57:17,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:17,771 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 40 treesize of output 34 [2023-02-15 00:57:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:17,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274967487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:17,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:17,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 44 [2023-02-15 00:57:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011629492] [2023-02-15 00:57:17,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:17,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 00:57:17,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 00:57:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1694, Unknown=1, NotChecked=82, Total=1892 [2023-02-15 00:57:17,951 INFO L87 Difference]: Start difference. First operand 436 states and 488 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:21,758 INFO L93 Difference]: Finished difference Result 884 states and 958 transitions. [2023-02-15 00:57:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 00:57:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 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 45 [2023-02-15 00:57:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:21,760 INFO L225 Difference]: With dead ends: 884 [2023-02-15 00:57:21,761 INFO L226 Difference]: Without dead ends: 809 [2023-02-15 00:57:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 7 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=836, Invalid=8095, Unknown=3, NotChecked=186, Total=9120 [2023-02-15 00:57:21,761 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1108 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:21,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 2645 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2677 Invalid, 1 Unknown, 233 Unchecked, 1.1s Time] [2023-02-15 00:57:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2023-02-15 00:57:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 509. [2023-02-15 00:57:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 505 states have (on average 1.1267326732673266) internal successors, (569), 508 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 569 transitions. [2023-02-15 00:57:21,768 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 569 transitions. Word has length 45 [2023-02-15 00:57:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:21,768 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 569 transitions. [2023-02-15 00:57:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 569 transitions. [2023-02-15 00:57:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 00:57:21,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:21,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:21,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-15 00:57:21,970 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 270674946, now seen corresponding path program 4 times [2023-02-15 00:57:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:21,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962139627] [2023-02-15 00:57:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962139627] [2023-02-15 00:57:22,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962139627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:22,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880052038] [2023-02-15 00:57:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:57:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:22,165 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) [2023-02-15 00:57:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 00:57:22,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:57:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 00:57:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:22,284 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 [2023-02-15 00:57:22,427 INFO L321 Elim1Store]: treesize reduction 43, result has 54.7 percent of original size [2023-02-15 00:57:22,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 65 [2023-02-15 00:57:22,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:22,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 83 [2023-02-15 00:57:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 00:57:23,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:23,763 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 179 treesize of output 173 [2023-02-15 00:57:23,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 108 treesize of output 98 [2023-02-15 00:57:23,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:23,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-02-15 00:57:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 00:57:23,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880052038] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:23,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:23,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2023-02-15 00:57:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751445102] [2023-02-15 00:57:23,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 00:57:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 00:57:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 00:57:23,907 INFO L87 Difference]: Start difference. First operand 509 states and 569 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:29,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:29,600 INFO L93 Difference]: Finished difference Result 642 states and 695 transitions. [2023-02-15 00:57:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 00:57:29,600 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-15 00:57:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:29,607 INFO L225 Difference]: With dead ends: 642 [2023-02-15 00:57:29,607 INFO L226 Difference]: Without dead ends: 642 [2023-02-15 00:57:29,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=848, Invalid=4408, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 00:57:29,608 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 365 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:29,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 412 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 00:57:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-02-15 00:57:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 595. [2023-02-15 00:57:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 591 states have (on average 1.1065989847715736) internal successors, (654), 594 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 654 transitions. [2023-02-15 00:57:29,614 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 654 transitions. Word has length 45 [2023-02-15 00:57:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:29,615 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 654 transitions. [2023-02-15 00:57:29,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 654 transitions. [2023-02-15 00:57:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 00:57:29,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:29,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:29,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-15 00:57:29,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:29,821 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash -552868814, now seen corresponding path program 3 times [2023-02-15 00:57:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:29,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303378115] [2023-02-15 00:57:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:29,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303378115] [2023-02-15 00:57:30,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303378115] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423868496] [2023-02-15 00:57:30,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:57:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:30,220 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) [2023-02-15 00:57:30,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 00:57:30,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 00:57:30,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 00:57:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:30,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 00:57:30,360 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 10 treesize of output 8 [2023-02-15 00:57:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:30,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:57:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423868496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:31,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:31,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 41 [2023-02-15 00:57:31,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675839458] [2023-02-15 00:57:31,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:31,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 00:57:31,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 00:57:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 00:57:31,378 INFO L87 Difference]: Start difference. First operand 595 states and 654 transitions. Second operand has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:34,937 INFO L93 Difference]: Finished difference Result 799 states and 858 transitions. [2023-02-15 00:57:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 00:57:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-15 00:57:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:34,939 INFO L225 Difference]: With dead ends: 799 [2023-02-15 00:57:34,939 INFO L226 Difference]: Without dead ends: 772 [2023-02-15 00:57:34,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 00:57:34,942 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1701 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:34,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 781 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 00:57:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-02-15 00:57:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 592. [2023-02-15 00:57:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 588 states have (on average 1.1054421768707483) internal successors, (650), 591 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 650 transitions. [2023-02-15 00:57:34,953 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 650 transitions. Word has length 46 [2023-02-15 00:57:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:34,954 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 650 transitions. [2023-02-15 00:57:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 42 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 650 transitions. [2023-02-15 00:57:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 00:57:34,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:34,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:34,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:35,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:35,161 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1658467354, now seen corresponding path program 4 times [2023-02-15 00:57:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969977895] [2023-02-15 00:57:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:35,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969977895] [2023-02-15 00:57:35,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969977895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195523915] [2023-02-15 00:57:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:57:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:35,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:57:35,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 00:57:35,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:57:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 00:57:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:36,212 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 7 treesize of output 5 [2023-02-15 00:57:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:36,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195523915] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:36,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:36,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2023-02-15 00:57:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620092662] [2023-02-15 00:57:36,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 00:57:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 00:57:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 00:57:36,354 INFO L87 Difference]: Start difference. First operand 592 states and 650 transitions. Second operand has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:37,194 INFO L93 Difference]: Finished difference Result 1012 states and 1093 transitions. [2023-02-15 00:57:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 00:57:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 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 [2023-02-15 00:57:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:37,197 INFO L225 Difference]: With dead ends: 1012 [2023-02-15 00:57:37,197 INFO L226 Difference]: Without dead ends: 1000 [2023-02-15 00:57:37,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 00:57:37,198 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 772 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:37,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1259 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 00:57:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-02-15 00:57:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 592. [2023-02-15 00:57:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 588 states have (on average 1.1071428571428572) internal successors, (651), 591 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 651 transitions. [2023-02-15 00:57:37,227 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 651 transitions. Word has length 49 [2023-02-15 00:57:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:37,227 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 651 transitions. [2023-02-15 00:57:37,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 651 transitions. [2023-02-15 00:57:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 00:57:37,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:37,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:37,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-15 00:57:37,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:37,433 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1568185901, now seen corresponding path program 1 times [2023-02-15 00:57:37,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:37,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728820598] [2023-02-15 00:57:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:37,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728820598] [2023-02-15 00:57:37,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728820598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:37,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335252219] [2023-02-15 00:57:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:37,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:37,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:57:38,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 00:57:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-15 00:57:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:57:38,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 00:57:38,194 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 10 treesize of output 8 [2023-02-15 00:57:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:38,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:39,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:57:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:57:39,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335252219] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:39,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:39,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2023-02-15 00:57:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485200558] [2023-02-15 00:57:39,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 00:57:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 00:57:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 00:57:39,523 INFO L87 Difference]: Start difference. First operand 592 states and 651 transitions. Second operand has 49 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:57:42,232 INFO L93 Difference]: Finished difference Result 745 states and 804 transitions. [2023-02-15 00:57:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 00:57:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 50 [2023-02-15 00:57:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:57:42,234 INFO L225 Difference]: With dead ends: 745 [2023-02-15 00:57:42,234 INFO L226 Difference]: Without dead ends: 743 [2023-02-15 00:57:42,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1488, Invalid=5652, Unknown=0, NotChecked=0, Total=7140 [2023-02-15 00:57:42,235 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 689 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 00:57:42,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 331 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 00:57:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-02-15 00:57:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 621. [2023-02-15 00:57:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 617 states have (on average 1.1053484602917343) internal successors, (682), 620 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 682 transitions. [2023-02-15 00:57:42,240 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 682 transitions. Word has length 50 [2023-02-15 00:57:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:57:42,240 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 682 transitions. [2023-02-15 00:57:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 682 transitions. [2023-02-15 00:57:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 00:57:42,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:57:42,241 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:57:42,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 00:57:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:42,442 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:57:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:57:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 8 times [2023-02-15 00:57:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:57:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192204145] [2023-02-15 00:57:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:57:42,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:57:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:57:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:57:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192204145] [2023-02-15 00:57:42,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192204145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:57:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854151346] [2023-02-15 00:57:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:57:42,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:57:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:57:42,952 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:57:42,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 00:57:43,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:57:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:57:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-15 00:57:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:57:43,071 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 10 treesize of output 8 [2023-02-15 00:57:43,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:57:43,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:57:43,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:43,664 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 17 [2023-02-15 00:57:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:43,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:57:44,122 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 [2023-02-15 00:57:44,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:44,127 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:57:44,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:57:44,131 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 40 treesize of output 34 [2023-02-15 00:57:44,132 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 7 treesize of output 3 [2023-02-15 00:57:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:57:44,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854151346] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:57:44,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:57:44,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 53 [2023-02-15 00:57:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462243939] [2023-02-15 00:57:44,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:57:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 00:57:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:57:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 00:57:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2600, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 00:57:44,474 INFO L87 Difference]: Start difference. First operand 621 states and 682 transitions. Second operand has 54 states, 53 states have (on average 2.69811320754717) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:57:48,171 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] [2023-02-15 00:57:53,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:57:55,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:57:57,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:57:59,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:58:01,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:58:04,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:58:07,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 00:58:09,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 00:58:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:15,220 INFO L93 Difference]: Finished difference Result 1078 states and 1161 transitions. [2023-02-15 00:58:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 00:58:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.69811320754717) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 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 51 [2023-02-15 00:58:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:15,223 INFO L225 Difference]: With dead ends: 1078 [2023-02-15 00:58:15,223 INFO L226 Difference]: Without dead ends: 1068 [2023-02-15 00:58:15,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1765, Invalid=8135, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 00:58:15,224 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1264 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 85 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:15,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 2051 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2451 Invalid, 9 Unknown, 0 Unchecked, 19.9s Time] [2023-02-15 00:58:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2023-02-15 00:58:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 629. [2023-02-15 00:58:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 625 states have (on average 1.1072) internal successors, (692), 628 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 692 transitions. [2023-02-15 00:58:15,236 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 692 transitions. Word has length 51 [2023-02-15 00:58:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:15,236 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 692 transitions. [2023-02-15 00:58:15,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.69811320754717) internal successors, (143), 54 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 692 transitions. [2023-02-15 00:58:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 00:58:15,241 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:15,241 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:15,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-15 00:58:15,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 00:58:15,446 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1109898556, now seen corresponding path program 4 times [2023-02-15 00:58:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:15,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946877806] [2023-02-15 00:58:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:15,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946877806] [2023-02-15 00:58:15,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946877806] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:15,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456063318] [2023-02-15 00:58:15,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:58:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:16,006 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:16,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 00:58:16,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:58:16,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 00:58:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:16,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 00:58:16,178 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 10 treesize of output 8 [2023-02-15 00:58:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:16,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:17,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456063318] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:17,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:17,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2023-02-15 00:58:17,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200315934] [2023-02-15 00:58:17,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 00:58:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 00:58:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 00:58:17,353 INFO L87 Difference]: Start difference. First operand 629 states and 692 transitions. Second operand has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 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) [2023-02-15 00:58:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:20,236 INFO L93 Difference]: Finished difference Result 884 states and 950 transitions. [2023-02-15 00:58:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 00:58:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 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) Word has length 52 [2023-02-15 00:58:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:20,239 INFO L225 Difference]: With dead ends: 884 [2023-02-15 00:58:20,239 INFO L226 Difference]: Without dead ends: 857 [2023-02-15 00:58:20,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1329, Invalid=4991, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 00:58:20,239 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 789 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:20,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 966 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 00:58:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-02-15 00:58:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 614. [2023-02-15 00:58:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 610 states have (on average 1.1065573770491803) internal successors, (675), 613 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 675 transitions. [2023-02-15 00:58:20,247 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 675 transitions. Word has length 52 [2023-02-15 00:58:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:20,248 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 675 transitions. [2023-02-15 00:58:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.5) internal successors, (154), 45 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) [2023-02-15 00:58:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 675 transitions. [2023-02-15 00:58:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 00:58:20,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:20,249 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:20,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-15 00:58:20,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-15 00:58:20,455 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 9 times [2023-02-15 00:58:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:20,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726694956] [2023-02-15 00:58:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726694956] [2023-02-15 00:58:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726694956] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091140815] [2023-02-15 00:58:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:58:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:20,885 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:20,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 00:58:21,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 00:58:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 00:58:21,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:21,020 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 10 treesize of output 8 [2023-02-15 00:58:21,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:58:21,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:58:21,438 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 [2023-02-15 00:58:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:21,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:21,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:21,573 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:58:21,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:21,577 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 40 treesize of output 34 [2023-02-15 00:58:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:21,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091140815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:21,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:21,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 37 [2023-02-15 00:58:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332482866] [2023-02-15 00:58:21,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 00:58:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 00:58:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1220, Unknown=3, NotChecked=0, Total=1332 [2023-02-15 00:58:21,758 INFO L87 Difference]: Start difference. First operand 614 states and 675 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:23,045 INFO L93 Difference]: Finished difference Result 1248 states and 1346 transitions. [2023-02-15 00:58:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 00:58:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 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 53 [2023-02-15 00:58:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:23,048 INFO L225 Difference]: With dead ends: 1248 [2023-02-15 00:58:23,048 INFO L226 Difference]: Without dead ends: 1206 [2023-02-15 00:58:23,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=3054, Unknown=3, NotChecked=0, Total=3422 [2023-02-15 00:58:23,048 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 493 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2449 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:23,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 2449 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 00:58:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2023-02-15 00:58:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 652. [2023-02-15 00:58:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 648 states have (on average 1.1111111111111112) internal successors, (720), 651 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 720 transitions. [2023-02-15 00:58:23,058 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 720 transitions. Word has length 53 [2023-02-15 00:58:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:23,058 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 720 transitions. [2023-02-15 00:58:23,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 720 transitions. [2023-02-15 00:58:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 00:58:23,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:23,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:23,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-15 00:58:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 00:58:23,265 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash -511118732, now seen corresponding path program 2 times [2023-02-15 00:58:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060471146] [2023-02-15 00:58:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:58:23,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060471146] [2023-02-15 00:58:23,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060471146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022899385] [2023-02-15 00:58:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:58:23,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:23,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:23,629 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:23,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 00:58:23,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:58:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 00:58:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:23,745 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 10 treesize of output 8 [2023-02-15 00:58:23,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-02-15 00:58:24,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 00:58:24,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 00:58:24,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:24,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:24,323 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 17 treesize of output 10 [2023-02-15 00:58:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:58:24,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:24,425 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1130 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1130) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2023-02-15 00:58:24,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:24,647 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-02-15 00:58:24,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:24,652 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 37 treesize of output 36 [2023-02-15 00:58:24,655 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 11 treesize of output 7 [2023-02-15 00:58:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-02-15 00:58:25,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022899385] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:25,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:25,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 48 [2023-02-15 00:58:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616251832] [2023-02-15 00:58:25,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:25,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 00:58:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 00:58:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1981, Unknown=9, NotChecked=90, Total=2256 [2023-02-15 00:58:25,164 INFO L87 Difference]: Start difference. First operand 652 states and 720 transitions. Second operand has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:26,854 INFO L93 Difference]: Finished difference Result 657 states and 720 transitions. [2023-02-15 00:58:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 00:58:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 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 54 [2023-02-15 00:58:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:26,856 INFO L225 Difference]: With dead ends: 657 [2023-02-15 00:58:26,856 INFO L226 Difference]: Without dead ends: 584 [2023-02-15 00:58:26,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=663, Invalid=4023, Unknown=10, NotChecked=134, Total=4830 [2023-02-15 00:58:26,857 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 348 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 17 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:26,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 536 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 956 Invalid, 8 Unknown, 62 Unchecked, 0.5s Time] [2023-02-15 00:58:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2023-02-15 00:58:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2023-02-15 00:58:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 580 states have (on average 1.1137931034482758) internal successors, (646), 583 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 646 transitions. [2023-02-15 00:58:26,861 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 646 transitions. Word has length 54 [2023-02-15 00:58:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:26,862 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 646 transitions. [2023-02-15 00:58:26,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 646 transitions. [2023-02-15 00:58:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 00:58:26,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:26,863 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:26,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 00:58:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:27,067 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 10 times [2023-02-15 00:58:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501098896] [2023-02-15 00:58:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:27,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501098896] [2023-02-15 00:58:27,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501098896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:27,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597804278] [2023-02-15 00:58:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:58:27,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:27,666 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:27,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 00:58:27,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:58:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 00:58:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:28,235 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 [2023-02-15 00:58:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:28,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-02-15 00:58:28,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:28,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:28,733 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 10 [2023-02-15 00:58:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:28,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:29,078 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 79 treesize of output 73 [2023-02-15 00:58:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597804278] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:29,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:29,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 64 [2023-02-15 00:58:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786408050] [2023-02-15 00:58:29,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:29,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 00:58:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 00:58:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3837, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 00:58:29,592 INFO L87 Difference]: Start difference. First operand 584 states and 646 transitions. Second operand has 64 states, 64 states have (on average 2.546875) internal successors, (163), 64 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:36,379 INFO L93 Difference]: Finished difference Result 763 states and 826 transitions. [2023-02-15 00:58:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-15 00:58:36,380 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.546875) internal successors, (163), 64 states have internal predecessors, (163), 0 states have call successors, (0), 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 57 [2023-02-15 00:58:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:36,381 INFO L225 Difference]: With dead ends: 763 [2023-02-15 00:58:36,381 INFO L226 Difference]: Without dead ends: 711 [2023-02-15 00:58:36,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4251 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1955, Invalid=19215, Unknown=0, NotChecked=0, Total=21170 [2023-02-15 00:58:36,382 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 671 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 3254 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:36,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1832 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 00:58:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2023-02-15 00:58:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 631. [2023-02-15 00:58:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 627 states have (on average 1.1068580542264752) internal successors, (694), 630 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 694 transitions. [2023-02-15 00:58:36,389 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 694 transitions. Word has length 57 [2023-02-15 00:58:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:36,389 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 694 transitions. [2023-02-15 00:58:36,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.546875) internal successors, (163), 64 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 694 transitions. [2023-02-15 00:58:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 00:58:36,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:36,390 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:36,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 00:58:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 00:58:36,597 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash -220338125, now seen corresponding path program 1 times [2023-02-15 00:58:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087853015] [2023-02-15 00:58:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:37,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:37,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087853015] [2023-02-15 00:58:37,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087853015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:37,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569460435] [2023-02-15 00:58:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:37,211 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:37,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 00:58:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 00:58:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:37,342 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 10 treesize of output 8 [2023-02-15 00:58:37,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 00:58:37,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-02-15 00:58:38,266 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-02-15 00:58:38,267 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 10 [2023-02-15 00:58:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:38,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:38,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:38,640 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-02-15 00:58:38,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:38,643 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 40 treesize of output 34 [2023-02-15 00:58:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:58:38,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569460435] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:38,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:38,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 23] total 55 [2023-02-15 00:58:38,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426396285] [2023-02-15 00:58:38,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:38,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 00:58:38,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 00:58:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2808, Unknown=10, NotChecked=0, Total=2970 [2023-02-15 00:58:38,804 INFO L87 Difference]: Start difference. First operand 631 states and 694 transitions. Second operand has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:43,391 INFO L93 Difference]: Finished difference Result 1673 states and 1800 transitions. [2023-02-15 00:58:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 00:58:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 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 57 [2023-02-15 00:58:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:43,394 INFO L225 Difference]: With dead ends: 1673 [2023-02-15 00:58:43,394 INFO L226 Difference]: Without dead ends: 1543 [2023-02-15 00:58:43,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=985, Invalid=9105, Unknown=10, NotChecked=0, Total=10100 [2023-02-15 00:58:43,395 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 2291 mSDsluCounter, 3342 mSDsCounter, 0 mSdLazyCounter, 4413 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 3454 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:43,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 3454 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4413 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-15 00:58:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2023-02-15 00:58:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 683. [2023-02-15 00:58:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 679 states have (on average 1.1119293078055965) internal successors, (755), 682 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 755 transitions. [2023-02-15 00:58:43,410 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 755 transitions. Word has length 57 [2023-02-15 00:58:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:43,410 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 755 transitions. [2023-02-15 00:58:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4727272727272727) internal successors, (136), 55 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 755 transitions. [2023-02-15 00:58:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 00:58:43,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:43,411 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:43,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 00:58:43,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-15 00:58:43,617 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash 639380870, now seen corresponding path program 5 times [2023-02-15 00:58:43,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:43,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385282538] [2023-02-15 00:58:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:43,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:44,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385282538] [2023-02-15 00:58:44,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385282538] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:44,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654603211] [2023-02-15 00:58:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:58:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:44,149 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:44,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 00:58:44,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 00:58:44,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 00:58:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:44,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-02-15 00:58:44,329 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 10 treesize of output 8 [2023-02-15 00:58:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 28 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:45,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:45,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:58:45,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654603211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:45,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:45,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2023-02-15 00:58:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322543790] [2023-02-15 00:58:45,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 00:58:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 00:58:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 00:58:45,768 INFO L87 Difference]: Start difference. First operand 683 states and 755 transitions. Second operand has 51 states, 50 states have (on average 3.44) internal successors, (172), 51 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:47,376 INFO L93 Difference]: Finished difference Result 1111 states and 1200 transitions. [2023-02-15 00:58:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 00:58:47,376 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.44) internal successors, (172), 51 states have internal predecessors, (172), 0 states have call successors, (0), 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 [2023-02-15 00:58:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:47,378 INFO L225 Difference]: With dead ends: 1111 [2023-02-15 00:58:47,378 INFO L226 Difference]: Without dead ends: 1084 [2023-02-15 00:58:47,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1112, Invalid=4588, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 00:58:47,379 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 704 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:47,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1251 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 00:58:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2023-02-15 00:58:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 680. [2023-02-15 00:58:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 676 states have (on average 1.1109467455621302) internal successors, (751), 679 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 751 transitions. [2023-02-15 00:58:47,385 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 751 transitions. Word has length 58 [2023-02-15 00:58:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:47,385 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 751 transitions. [2023-02-15 00:58:47,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.44) internal successors, (172), 51 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 751 transitions. [2023-02-15 00:58:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 00:58:47,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:47,386 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:47,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 00:58:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:47,586 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -674638333, now seen corresponding path program 5 times [2023-02-15 00:58:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488402851] [2023-02-15 00:58:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:58:48,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488402851] [2023-02-15 00:58:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488402851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016571714] [2023-02-15 00:58:48,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:58:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:48,009 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:48,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 00:58:48,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 00:58:48,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-15 00:58:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:48,357 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 [2023-02-15 00:58:48,573 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-15 00:58:48,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2023-02-15 00:58:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:48,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2023-02-15 00:58:48,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-02-15 00:58:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:48,904 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:58:48,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:48,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2023-02-15 00:58:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 00:58:48,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:49,072 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| v_ArrVal_1339) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2023-02-15 00:58:49,436 INFO L321 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2023-02-15 00:58:49,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 87 [2023-02-15 00:58:49,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:49,445 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 49 treesize of output 51 [2023-02-15 00:58:49,450 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 11 treesize of output 7 [2023-02-15 00:58:49,491 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 6 treesize of output 4 [2023-02-15 00:58:49,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:58:49,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2023-02-15 00:58:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 4 not checked. [2023-02-15 00:58:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016571714] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:49,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:49,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 21] total 54 [2023-02-15 00:58:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384193082] [2023-02-15 00:58:49,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:49,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 00:58:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:49,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 00:58:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2546, Unknown=38, NotChecked=102, Total=2862 [2023-02-15 00:58:49,866 INFO L87 Difference]: Start difference. First operand 680 states and 751 transitions. Second operand has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:58:54,147 INFO L93 Difference]: Finished difference Result 1273 states and 1383 transitions. [2023-02-15 00:58:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 00:58:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 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 61 [2023-02-15 00:58:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:58:54,149 INFO L225 Difference]: With dead ends: 1273 [2023-02-15 00:58:54,149 INFO L226 Difference]: Without dead ends: 1201 [2023-02-15 00:58:54,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1219, Invalid=9251, Unknown=40, NotChecked=202, Total=10712 [2023-02-15 00:58:54,151 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1116 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 32 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:58:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 856 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1774 Invalid, 11 Unknown, 102 Unchecked, 1.0s Time] [2023-02-15 00:58:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2023-02-15 00:58:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 869. [2023-02-15 00:58:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 865 states have (on average 1.1260115606936416) internal successors, (974), 868 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 974 transitions. [2023-02-15 00:58:54,169 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 974 transitions. Word has length 61 [2023-02-15 00:58:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:58:54,170 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 974 transitions. [2023-02-15 00:58:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5) internal successors, (135), 54 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:58:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 974 transitions. [2023-02-15 00:58:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 00:58:54,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:58:54,171 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:58:54,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 00:58:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:54,376 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:58:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:58:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 6 times [2023-02-15 00:58:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:58:54,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982690551] [2023-02-15 00:58:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:58:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:58:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:58:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:58:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:58:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982690551] [2023-02-15 00:58:55,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982690551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:58:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145499215] [2023-02-15 00:58:55,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:58:55,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:58:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:58:55,021 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:58:55,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 00:58:55,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 00:58:55,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:58:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 00:58:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:58:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:58:55,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-02-15 00:58:55,216 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 10 treesize of output 8 [2023-02-15 00:58:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:58:55,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:58:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:58:56,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145499215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:58:56,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:58:56,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2023-02-15 00:58:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991966414] [2023-02-15 00:58:56,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:58:56,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 00:58:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:58:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 00:58:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2572, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 00:58:56,640 INFO L87 Difference]: Start difference. First operand 869 states and 974 transitions. Second operand has 54 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 54 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) [2023-02-15 00:59:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:59:11,430 INFO L93 Difference]: Finished difference Result 2597 states and 2801 transitions. [2023-02-15 00:59:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-02-15 00:59:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 54 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 62 [2023-02-15 00:59:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:59:11,436 INFO L225 Difference]: With dead ends: 2597 [2023-02-15 00:59:11,436 INFO L226 Difference]: Without dead ends: 2587 [2023-02-15 00:59:11,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12980 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5900, Invalid=31156, Unknown=0, NotChecked=0, Total=37056 [2023-02-15 00:59:11,438 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2224 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:59:11,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2224 Valid, 1223 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 00:59:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-02-15 00:59:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 997. [2023-02-15 00:59:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 993 states have (on average 1.1168177240684793) internal successors, (1109), 996 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:59:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1109 transitions. [2023-02-15 00:59:11,450 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1109 transitions. Word has length 62 [2023-02-15 00:59:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:59:11,451 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1109 transitions. [2023-02-15 00:59:11,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 54 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) [2023-02-15 00:59:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1109 transitions. [2023-02-15 00:59:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 00:59:11,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:59:11,452 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:59:11,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 00:59:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-15 00:59:11,659 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:59:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:59:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2039972479, now seen corresponding path program 3 times [2023-02-15 00:59:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:59:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040204938] [2023-02-15 00:59:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:59:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:59:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:59:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:59:12,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:59:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040204938] [2023-02-15 00:59:12,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040204938] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:59:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831482163] [2023-02-15 00:59:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:59:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:59:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:59:12,292 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:59:12,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 00:59:12,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 00:59:12,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:59:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 00:59:12,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:59:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:59:12,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-02-15 00:59:12,604 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 10 treesize of output 8 [2023-02-15 00:59:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 00:59:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:59:14,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:59:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 00:59:14,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831482163] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:59:14,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:59:14,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2023-02-15 00:59:14,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687215385] [2023-02-15 00:59:14,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:59:14,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 00:59:14,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:59:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 00:59:14,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=3267, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 00:59:14,574 INFO L87 Difference]: Start difference. First operand 997 states and 1109 transitions. Second operand has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 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) [2023-02-15 00:59:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:59:18,582 INFO L93 Difference]: Finished difference Result 1356 states and 1478 transitions. [2023-02-15 00:59:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 00:59:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 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) Word has length 62 [2023-02-15 00:59:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:59:18,585 INFO L225 Difference]: With dead ends: 1356 [2023-02-15 00:59:18,585 INFO L226 Difference]: Without dead ends: 1354 [2023-02-15 00:59:18,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2168, Invalid=8134, Unknown=0, NotChecked=0, Total=10302 [2023-02-15 00:59:18,586 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 601 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:59:18,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 703 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 00:59:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2023-02-15 00:59:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 983. [2023-02-15 00:59:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 979 states have (on average 1.1215526046986721) internal successors, (1098), 982 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:59:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1098 transitions. [2023-02-15 00:59:18,603 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1098 transitions. Word has length 62 [2023-02-15 00:59:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:59:18,604 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1098 transitions. [2023-02-15 00:59:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.9) internal successors, (174), 61 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) [2023-02-15 00:59:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1098 transitions. [2023-02-15 00:59:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 00:59:18,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:59:18,607 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:59:18,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 00:59:18,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:59:18,812 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-02-15 00:59:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:59:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1009452997, now seen corresponding path program 4 times [2023-02-15 00:59:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:59:18,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871797023] [2023-02-15 00:59:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:59:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:59:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:59:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 00:59:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:59:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871797023] [2023-02-15 00:59:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871797023] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:59:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302019161] [2023-02-15 00:59:19,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:59:19,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:59:19,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:59:19,155 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:59:19,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 00:59:19,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:59:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:59:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 00:59:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:59:19,489 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 [2023-02-15 00:59:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:59:19,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 00:59:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 00:59:19,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-15 00:59:19,866 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 00:59:19,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 00:59:19,868 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 17 treesize of output 10 [2023-02-15 00:59:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:59:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:00:07,662 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~s~0#1.offset_277| Int) (|ULTIMATE.start_cstrncat_~s~0#1.base| Int) (v_ArrVal_1500 Int) (v_ArrVal_1502 Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| Int)) (or (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| v_ArrVal_1500) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_277| v_ArrVal_1502)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~s2#1.offset|)) 0) (not (<= (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 3) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278|)) (not (<= (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| 1) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_277|)))) is different from false [2023-02-15 01:00:09,709 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~s~0#1.offset_277| Int) (|ULTIMATE.start_cstrncat_~s~0#1.base| Int) (v_ArrVal_1500 Int) (v_ArrVal_1502 Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| Int)) (or (not (<= (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278|)) (not (<= (+ |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| 1) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_277|)) (= 0 (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base| (store (store (select |c_#memory_int| |ULTIMATE.start_cstrncat_~s~0#1.base|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_278| v_ArrVal_1500) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_277| v_ArrVal_1502)) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))))) is different from false [2023-02-15 01:00:09,716 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 1210 treesize of output 1162